21110212112 has 20 divisors (see below), whose sum is σ = 44619312336. Its totient is φ = 9595550880.

The previous prime is 21110212099. The next prime is 21110212127. The reversal of 21110212112 is 21121201112.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59972018 + ... + 59972369.

Almost surely, 2^21110212112 is an apocalyptic number.

21110212112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21110212112 is an abundant number, since it is smaller than the sum of its proper divisors (23509100224).

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

21110212112 is a wasteful number, since it uses less digits than its factorization.

21110212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119944406 (or 119944400 counting only the distinct ones).

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

Adding to 21110212112 its reverse (21121201112), we get a palindrome (42231413224).

The spelling of 21110212112 in words is "twenty-one billion, one hundred ten million, two hundred twelve thousand, one hundred twelve".