21312020313300 has 72 divisors (see below), whose sum is σ = 61683179273856. Its totient is φ = 5681325186560.

The previous prime is 21312020313169. The next prime is 21312020313329. The reversal of 21312020313300 is 331302021312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10843029 + ... + 12656828.

It is an arithmetic number, because the mean of its divisors is an integer number (856710823248).

Almost surely, 2^{21312020313300} is an apocalyptic number.

21312020313300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21312020313300 is an abundant number, since it is smaller than the sum of its proper divisors (40371158960556).

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

21312020313300 is a wasteful number, since it uses less digits than its factorization.

21312020313300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23502897 (or 23502890 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21312020313300 its reverse (331302021312), we get a palindrome (21643322334612).

The spelling of 21312020313300 in words is "twenty-one trillion, three hundred twelve billion, twenty million, three hundred thirteen thousand, three hundred".