21012000310200 has 96 divisors (see below), whose sum is σ = 65713636580400. Its totient is φ = 5553614223360.

The previous prime is 21012000310187. The next prime is 21012000310201. The reversal of 21012000310200 is 201300021012.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012000310201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 154887955 + ... + 155023554.

Almost surely, 2^{21012000310200} is an apocalyptic number.

21012000310200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21012000310200 is an abundant number, since it is smaller than the sum of its proper divisors (44701636270200).

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

21012000310200 is a wasteful number, since it uses less digits than its factorization.

21012000310200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309911641 (or 309911632 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21012000310200 its reverse (201300021012), we get a palindrome (21213300331212).

The spelling of 21012000310200 in words is "twenty-one trillion, twelve billion, three hundred ten thousand, two hundred".