21312300231020 has 12 divisors (see below), whose sum is σ = 44755830485184. Its totient is φ = 8524920092400.

The previous prime is 21312300231011. The next prime is 21312300231043. The reversal of 21312300231020 is 2013200321312.

It is a super-2 number, since 2×21312300231020² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1065615011551 = 21312300231020 / (2 + 1 + 3 + 1 + 2 + 3 + 0 + 0 + 2 + 3 + 1 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 21312300230983 and 21312300231001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 532807505756 + ... + 532807505795.

It is an arithmetic number, because the mean of its divisors is an integer number (3729652540432).

Almost surely, 2^{21312300231020} is an apocalyptic number.

21312300231020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21312300231020 is an abundant number, since it is smaller than the sum of its proper divisors (23443530254164).

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

21312300231020 is a wasteful number, since it uses less digits than its factorization.

21312300231020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065615011560 (or 1065615011558 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21312300231020 its reverse (2013200321312), we get a palindrome (23325500552332).

The spelling of 21312300231020 in words is "twenty-one trillion, three hundred twelve billion, three hundred million, two hundred thirty-one thousand, twenty".