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211002020011221 = 3415953899539447
BaseRepresentation
bin101111111110011110111100…
…011100110001110011010101
31000200002121002120021221100020
4233332132330130301303111
5210124024114110324341
62024432553444535353
762305251520356525
oct5776367434616325
91020077076257306
10211002020011221
11612604aa53761a
121b7b97316b1559
13909753604583a
143a167a3583685
15195d9a7c60566
hexbfe7bc731cd5

211002020011221 has 32 divisors (see below), whose sum is σ = 293088571776000. Its totient is φ = 134908280757120.

The previous prime is 211002020011199. The next prime is 211002020011259. The reversal of 211002020011221 is 122110020200112.

It is not a de Polignac number, because 211002020011221 - 241 = 208802996755669 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211002020011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211002020011261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 390875320 + ... + 391414766.

It is an arithmetic number, because the mean of its divisors is an integer number (9159017868000).

Almost surely, 2211002020011221 is an apocalyptic number.

It is an amenable number.

211002020011221 is a deficient number, since it is larger than the sum of its proper divisors (82086551764779).

211002020011221 is a wasteful number, since it uses less digits than its factorization.

211002020011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593449.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 211002020011221 its reverse (122110020200112), we get a palindrome (333112040211333).

The spelling of 211002020011221 in words is "two hundred eleven trillion, two billion, twenty million, eleven thousand, two hundred twenty-one".

Divisors: 1 3 41 59 123 177 2419 7257 53899 161697 539447 1618341 2209859 3180041 6629577 9540123 22117327 31827373 66351981 95482119 130381681 391145043 1304922293 3914766879 29075653853 87226961559 1192101807973 1715463577327 3576305423919 5146390731981 70334006670407 211002020011221