21302320132331 has 16 divisors (see below), whose sum is σ = 25790416058880. Its totient is φ = 17176519255680.

The previous prime is 21302320132271. The next prime is 21302320132337. The reversal of 21302320132331 is 13323102320312.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21302320132331 is a prime.

It is a super-2 number, since 2×21302320132331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21302320132331.

It is not an unprimeable number, because it can be changed into a prime (21302320132337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44268671 + ... + 44747288.

It is an arithmetic number, because the mean of its divisors is an integer number (1611901003680).

Almost surely, 2^{21302320132331} is an apocalyptic number.

21302320132331 is a deficient number, since it is larger than the sum of its proper divisors (4488095926549).

21302320132331 is a wasteful number, since it uses less digits than its factorization.

21302320132331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89017994.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 21302320132331 its reverse (13323102320312), we get a palindrome (34625422452643).

The spelling of 21302320132331 in words is "twenty-one trillion, three hundred two billion, three hundred twenty million, one hundred thirty-two thousand, three hundred thirty-one".