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221001321001012 = 2255250330250253
BaseRepresentation
bin110010001111111111100001…
…001110111011000000110100
31001222111112001001012210102121
4302033333201032323000310
5212431341201134013022
62102010334423445324
764356550520404366
oct6217774116730064
91058445031183377
10221001321001012
1164466152237952
12209536532b6844
13964144841a346
143c80741914d36
151a83b416292c7
hexc8ffe13bb034

221001321001012 has 6 divisors (see below), whose sum is σ = 386752311751778. Its totient is φ = 110500660500504.

The previous prime is 221001321000991. The next prime is 221001321001103. The reversal of 221001321001012 is 210100123100122.

It can be written as a sum of positive squares in only one way, i.e., 213932337533476 + 7068983467536 = 14626426^2 + 2658756^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27625165125123 + ... + 27625165125130.

Almost surely, 2221001321001012 is an apocalyptic number.

It is an amenable number.

221001321001012 is a deficient number, since it is larger than the sum of its proper divisors (165750990750766).

221001321001012 is a wasteful number, since it uses less digits than its factorization.

221001321001012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55250330250257 (or 55250330250255 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 221001321001012 its reverse (210100123100122), we get a palindrome (431101444101134).

The spelling of 221001321001012 in words is "two hundred twenty-one trillion, one billion, three hundred twenty-one million, one thousand, twelve".

Divisors: 1 2 4 55250330250253 110500660500506 221001321001012