21102111113112 has 32 divisors (see below), whose sum is σ = 58616975314800. Its totient is φ = 7034037037632.

The previous prime is 21102111113107. The next prime is 21102111113119. The reversal of 21102111113112 is 21131111120112.

21102111113112 is a `hidden beast` number, since 21 + 10 + 211 + 111 + 311 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102111113119) 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, 48847479213 + ... + 48847479644.

Almost surely, 2^{21102111113112} is an apocalyptic number.

It is an amenable number.

21102111113112 is an abundant number, since it is smaller than the sum of its proper divisors (37514864201688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21102111113112 is a wasteful number, since it uses less digits than its factorization.

21102111113112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97694958872 (or 97694958862 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 18.

Adding to 21102111113112 its reverse (21131111120112), we get a palindrome (42233222233224).

The spelling of 21102111113112 in words is "twenty-one trillion, one hundred two billion, one hundred eleven million, one hundred thirteen thousand, one hundred twelve".