21021200112000 has 256 divisors, whose sum is σ = 76020305587200. Its totient is φ = 5096048384000.

The previous prime is 21021200111981. The next prime is 21021200112041. The reversal of 21021200112000 is 21100212012.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19378440 + ... + 20434439.

It is an arithmetic number, because the mean of its divisors is an integer number (296954318700).

Almost surely, 2^{21021200112000} is an apocalyptic number.

21021200112000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21021200112000 is an abundant number, since it is smaller than the sum of its proper divisors (54999105475200).

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

21021200112000 is a wasteful number, since it uses less digits than its factorization.

21021200112000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39812922 (or 39812900 counting only the distinct ones).

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

Adding to 21021200112000 its reverse (21100212012), we get a palindrome (21042300324012).

The spelling of 21021200112000 in words is "twenty-one trillion, twenty-one billion, two hundred million, one hundred twelve thousand".