21102200112 has 80 divisors (see below), whose sum is σ = 62792425472. Its totient is φ = 5981713920.

The previous prime is 21102200069. The next prime is 21102200143. The reversal of 21102200112 is 21100220112.

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 15 ways as a sum of consecutive naturals, for example, 204589 + ... + 289932.

Almost surely, 2^21102200112 is an apocalyptic number.

It is an amenable number.

21102200112 is an abundant number, since it is smaller than the sum of its proper divisors (41690225360).

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

21102200112 is a wasteful number, since it uses less digits than its factorization.

21102200112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494666 (or 494660 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21102200112 its reverse (21100220112), we get a palindrome (42202420224).

The spelling of 21102200112 in words is "twenty-one billion, one hundred two million, two hundred thousand, one hundred twelve".