21323302012331 has 16 divisors (see below), whose sum is σ = 23714554361856. Its totient is φ = 19009431540000.

The previous prime is 21323302012307. The next prime is 21323302012351. The reversal of 21323302012331 is 13321020332312.

It is a de Polignac number, because none of the positive numbers 2^k-21323302012331 is a prime.

It is a super-2 number, since 2×21323302012331² (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 21323302012331.

It is not an unprimeable number, because it can be changed into a prime (21323302012351) 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, 47781515 + ... + 48225716.

It is an arithmetic number, because the mean of its divisors is an integer number (1482159647616).

Almost surely, 2^{21323302012331} is an apocalyptic number.

21323302012331 is a deficient number, since it is larger than the sum of its proper divisors (2391252349525).

21323302012331 is a wasteful number, since it uses less digits than its factorization.

21323302012331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96007634.

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

Adding to 21323302012331 its reverse (13321020332312), we get a palindrome (34644322344643).

The spelling of 21323302012331 in words is "twenty-one trillion, three hundred twenty-three billion, three hundred two million, twelve thousand, three hundred thirty-one".