21121120010111 has 32 divisors (see below), whose sum is σ = 25309398067200. Its totient is φ = 17398888166880.

The previous prime is 21121120010083. The next prime is 21121120010113. The reversal of 21121120010111 is 11101002112112.

It is a de Polignac number, because none of the positive numbers 2^k-21121120010111 is a prime.

It is a super-2 number, since 2×21121120010111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121120010113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 157155380 + ... + 157289718.

It is an arithmetic number, because the mean of its divisors is an integer number (790918689600).

Almost surely, 2^{21121120010111} is an apocalyptic number.

21121120010111 is a deficient number, since it is larger than the sum of its proper divisors (4188278057089).

21121120010111 is a wasteful number, since it uses less digits than its factorization.

21121120010111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167099.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21121120010111 its reverse (11101002112112), we get a palindrome (32222122122223).

The spelling of 21121120010111 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred twenty million, ten thousand, one hundred eleven".