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211212101211121 = 1728575674347839
BaseRepresentation
bin110000000001100010100110…
…010000111101001111110001
31000200211200100111010122021201
4300001202212100331033301
5210140444340402223441
62025113255542051201
762326366523200063
oct6001424620751761
91020750314118251
10211212101211121
116133160493348a
121b8323a1419b01
1390b12a5b1274a
143a22a124c3733
1519641a1281c31
hexc018a643d3f1

211212101211121 has 8 divisors (see below), whose sum is σ = 223636472156160. Its totient is φ = 198787744676928.

The previous prime is 211212101211073. The next prime is 211212101211179. The reversal of 211212101211121 is 121112101212112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211212101211121 - 213 = 211212101202929 is a prime.

It is a super-2 number, since 2×2112121012111212 (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211212101211191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46404720 + ... + 50752558.

It is an arithmetic number, because the mean of its divisors is an integer number (27954559019520).

Almost surely, 2211212101211121 is an apocalyptic number.

It is an amenable number.

211212101211121 is a deficient number, since it is larger than the sum of its proper divisors (12424370945039).

211212101211121 is a wasteful number, since it uses less digits than its factorization.

211212101211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7205423.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 211212101211121 its reverse (121112101212112), we get a palindrome (332324202423233).

Subtracting from 211212101211121 its reverse (121112101212112), we obtain a palindrome (90099999999009).

The spelling of 211212101211121 in words is "two hundred eleven trillion, two hundred twelve billion, one hundred one million, two hundred eleven thousand, one hundred twenty-one".

Divisors: 1 17 2857567 4347839 48578639 73913263 12424241247713 211212101211121