21200112112000 has 64 divisors (see below), whose sum is σ = 52708778778240. Its totient is φ = 8480044838400.

The previous prime is 21200112111989. The next prime is 21200112112037. The reversal of 21200112112000 is 21121100212.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×21200112112000² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 662487504 + ... + 662519503.

It is an arithmetic number, because the mean of its divisors is an integer number (823574668410).

Almost surely, 2^{21200112112000} is an apocalyptic number.

21200112112000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21200112112000 is an abundant number, since it is smaller than the sum of its proper divisors (31508666666240).

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

21200112112000 is an equidigital number, since it uses as much as digits as its factorization.

21200112112000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1325007036 (or 1325007014 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21200112112000 its reverse (21121100212), we get a palindrome (21221233212212).

The spelling of 21200112112000 in words is "twenty-one trillion, two hundred billion, one hundred twelve million, one hundred twelve thousand".