21031001312200 has 576 divisors, whose sum is σ = 58197193891200. Its totient is φ = 7040968704000.

The previous prime is 21031001312161. The next prime is 21031001312261. The reversal of 21031001312200 is 221310013012.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 5697912355 + ... + 5697916045.

It is an arithmetic number, because the mean of its divisors is an integer number (101036794950).

Almost surely, 2^{21031001312200} is an apocalyptic number.

21031001312200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21031001312200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29098596945600).

21031001312200 is an abundant number, since it is smaller than the sum of its proper divisors (37166192579000).

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

21031001312200 is a wasteful number, since it uses less digits than its factorization.

21031001312200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4134 (or 4114 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21031001312200 its reverse (221310013012), we get a palindrome (21252311325212).

The spelling of 21031001312200 in words is "twenty-one trillion, thirty-one billion, one million, three hundred twelve thousand, two hundred".