21101210112 has 80 divisors (see below), whose sum is σ = 57734420832. Its totient is φ = 6843617280.

The previous prime is 21101210093. The next prime is 21101210159.

21101210112 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21101210112² (a number of 21 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128814 + ... + 242477.

Almost surely, 2^21101210112 is an apocalyptic number.

It is an amenable number.

21101210112 is an abundant number, since it is smaller than the sum of its proper divisors (36633210720).

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

21101210112 is an equidigital number, since it uses as much as digits as its factorization.

21101210112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371349 (or 371333 counting only the distinct ones).

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

The spelling of 21101210112 in words is "twenty-one billion, one hundred one million, two hundred ten thousand, one hundred twelve".