21112105113200 has 30 divisors (see below), whose sum is σ = 50721832535424. Its totient is φ = 8444842045120.

The previous prime is 21112105113137. The next prime is 21112105113221. The reversal of 21112105113200 is 231150121112.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26390130992 + ... + 26390131791.

Almost surely, 2^{21112105113200} is an apocalyptic number.

21112105113200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21112105113200 is an abundant number, since it is smaller than the sum of its proper divisors (29609727422224).

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

21112105113200 is a wasteful number, since it uses less digits than its factorization.

21112105113200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52780262801 (or 52780262790 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 20.

Adding to 21112105113200 its reverse (231150121112), we get a palindrome (21343255234312).

The spelling of 21112105113200 in words is "twenty-one trillion, one hundred twelve billion, one hundred five million, one hundred thirteen thousand, two hundred".