13121922131 has 2 divisors, whose sum is σ = 13121922132. Its totient is φ = 13121922130.

The previous prime is 13121922113. The next prime is 13121922157. The reversal of 13121922131 is 13122912131.

Together with previous prime (13121922113) it forms an Ormiston pair, because they use the same digits, order apart.

It is an a-pointer prime, because the next prime (13121922157) can be obtained adding 13121922131 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13121922131 - 2²² = 13117727827 is a prime.

It is a super-2 number, since 2×13121922131² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13121922131.

It is not a weakly prime, because it can be changed into another prime (13121922631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6560961065 + 6560961066.

It is an arithmetic number, because the mean of its divisors is an integer number (6560961066).

Almost surely, 2^13121922131 is an apocalyptic number.

13121922131 is a deficient number, since it is larger than the sum of its proper divisors (1).

13121922131 is an equidigital number, since it uses as much as digits as its factorization.

13121922131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 26.

The spelling of 13121922131 in words is "thirteen billion, one hundred twenty-one million, nine hundred twenty-two thousand, one hundred thirty-one".