21112102200112 has 60 divisors (see below), whose sum is σ = 51384414065488. Its totient is φ = 8225494358400.

The previous prime is 21112102200043. The next prime is 21112102200113. The reversal of 21112102200112 is 21100220121112.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (21112102200113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 778915839 + ... + 778942942.

Almost surely, 2^{21112102200112} is an apocalyptic number.

21112102200112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21112102200112 is an abundant number, since it is smaller than the sum of its proper divisors (30272311865376).

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

21112102200112 is a wasteful number, since it uses less digits than its factorization.

21112102200112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1557858818 (or 1557858801 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21112102200112 its reverse (21100220121112), we get a palindrome (42212322321224).

The spelling of 21112102200112 in words is "twenty-one trillion, one hundred twelve billion, one hundred two million, two hundred thousand, one hundred twelve".