21112010112 has 32 divisors (see below), whose sum is σ = 56078777880. Its totient is φ = 7037336576.

The previous prime is 21112010077. The next prime is 21112010123. The reversal of 21112010112 is 21101021112.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

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, 27489213 + ... + 27489980.

Almost surely, 2^21112010112 is an apocalyptic number.

It is an amenable number.

21112010112 is an abundant number, since it is smaller than the sum of its proper divisors (34966767768).

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

21112010112 is an equidigital number, since it uses as much as digits as its factorization.

21112010112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54979210 (or 54979198 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21112010112 its reverse (21101021112), we get a palindrome (42213031224).

The spelling of 21112010112 in words is "twenty-one billion, one hundred twelve million, ten thousand, one hundred twelve".