21312312321300 has 288 divisors, whose sum is σ = 82793118234624. Its totient is φ = 4087876032000.

The previous prime is 21312312321299. The next prime is 21312312321301. The reversal of 21312312321300 is 312321321312.

It is an interprime number because it is at equal distance from previous prime (21312312321299) and next prime (21312312321301).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21312312321301) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 35184736 + ... + 35785335.

Almost surely, 2^{21312312321300} is an apocalyptic number.

21312312321300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21312312321300 is an abundant number, since it is smaller than the sum of its proper divisors (61480805913324).

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

21312312321300 is a wasteful number, since it uses less digits than its factorization.

21312312321300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70970119 (or 70970112 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 21312312321300 its reverse (312321321312), we get a palindrome (21624633642612).

It can be divided in two parts, 21312312 and 321300, that added together give a palindrome (21633612).

The spelling of 21312312321300 in words is "twenty-one trillion, three hundred twelve billion, three hundred twelve million, three hundred twenty-one thousand, three hundred".