21312300231000 has 256 divisors, whose sum is σ = 75093837436800. Its totient is φ = 5590111104000.

The previous prime is 21312300230929. The next prime is 21312300231011. The reversal of 21312300231000 is 13200321312.

21312300231000 is a `hidden beast` number, since 2 + 131 + 2 + 300 + 231 + 0 + 0 + 0 = 666.

It is a super-2 number, since 2×21312300231000² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4823037 + ... + 8117036.

Almost surely, 2^{21312300231000} is an apocalyptic number.

21312300231000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21312300231000 is an abundant number, since it is smaller than the sum of its proper divisors (53781537205800).

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

21312300231000 is a wasteful number, since it uses less digits than its factorization.

21312300231000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12940164 (or 12940144 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21312300231000 its reverse (13200321312), we get a palindrome (21325500552312).

The spelling of 21312300231000 in words is "twenty-one trillion, three hundred twelve billion, three hundred million, two hundred thirty-one thousand".