21112000202111 has 12 divisors (see below), whose sum is σ = 26126769482352. Its totient is φ = 16704000158976.

The previous prime is 21112000202039. The next prime is 21112000202131. The reversal of 21112000202111 is 11120200021112.

It is a de Polignac number, because none of the positive numbers 2^k-21112000202111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112000202131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8923075826 + ... + 8923078191.

It is an arithmetic number, because the mean of its divisors is an integer number (2177230790196).

Almost surely, 2^{21112000202111} is an apocalyptic number.

21112000202111 is a deficient number, since it is larger than the sum of its proper divisors (5014769280241).

21112000202111 is a wasteful number, since it uses less digits than its factorization.

21112000202111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17846154050 (or 17846154037 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21112000202111 its reverse (11120200021112), we get a palindrome (32232200223223).

The spelling of 21112000202111 in words is "twenty-one trillion, one hundred twelve billion, two hundred two thousand, one hundred eleven".