211210021120121 has 24 divisors (see below), whose sum is σ = 232685452009920. Its totient is φ = 191169592723296.

The previous prime is 211210021120097. The next prime is 211210021120177. The reversal of 211210021120121 is 121021120012112.

It is a de Polignac number, because none of the positive numbers 2^k-211210021120121 is a prime.

It is a super-2 number, since 2×211210021120121² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211210021120121.

It is not an unprimeable number, because it can be changed into a prime (211210021123121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3744101 + ... + 20891106.

It is an arithmetic number, because the mean of its divisors is an integer number (9695227167080).

Almost surely, 2^{211210021120121} is an apocalyptic number.

It is an amenable number.

211210021120121 is a deficient number, since it is larger than the sum of its proper divisors (21475430889799).

211210021120121 is a wasteful number, since it uses less digits than its factorization.

211210021120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24636125 (or 24636102 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 211210021120121 its reverse (121021120012112), we get a palindrome (332231141132233).

The spelling of 211210021120121 in words is "two hundred eleven trillion, two hundred ten billion, twenty-one million, one hundred twenty thousand, one hundred twenty-one".