20331311012131 has 16 divisors (see below), whose sum is σ = 23477617038528. Its totient is φ = 17245636416000.

The previous prime is 20331311012123. The next prime is 20331311012153. The reversal of 20331311012131 is 13121011313302.

It is a cyclic number.

It is not a de Polignac number, because 20331311012131 - 2³ = 20331311012123 is a prime.

It is a super-2 number, since 2×20331311012131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20331311012431) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5805490 + ... + 8623591.

It is an arithmetic number, because the mean of its divisors is an integer number (1467351064908).

Almost surely, 2^{20331311012131} is an apocalyptic number.

20331311012131 is a deficient number, since it is larger than the sum of its proper divisors (3146306026397).

20331311012131 is a wasteful number, since it uses less digits than its factorization.

20331311012131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14431182.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 20331311012131 its reverse (13121011313302), we get a palindrome (33452322325433).

The spelling of 20331311012131 in words is "twenty trillion, three hundred thirty-one billion, three hundred eleven million, twelve thousand, one hundred thirty-one".