21333122130231 has 20 divisors (see below), whose sum is σ = 31871208045600. Its totient is φ = 14220648506016.

The previous prime is 21333122130227. The next prime is 21333122130251. The reversal of 21333122130231 is 13203122133312.

21333122130231 is a `hidden beast` number, since 2 + 1 + 3 + 331 + 2 + 21 + 302 + 3 + 1 = 666.

It is not a de Polignac number, because 21333122130231 - 2² = 21333122130227 is a prime.

It is a super-2 number, since 2×21333122130231² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21333122130195 and 21333122130204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21333122130251) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12458511 + ... + 14067008.

It is an arithmetic number, because the mean of its divisors is an integer number (1593560402280).

Almost surely, 2^{21333122130231} is an apocalyptic number.

21333122130231 is a deficient number, since it is larger than the sum of its proper divisors (10538085915369).

21333122130231 is an equidigital number, since it uses as much as digits as its factorization.

21333122130231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26535460 (or 26535451 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 21333122130231 its reverse (13203122133312), we get a palindrome (34536244263543).

The spelling of 21333122130231 in words is "twenty-one trillion, three hundred thirty-three billion, one hundred twenty-two million, one hundred thirty thousand, two hundred thirty-one".