123210012131 has 2 divisors, whose sum is σ = 123210012132. Its totient is φ = 123210012130.

The previous prime is 123210012109. The next prime is 123210012137. The reversal of 123210012131 is 131210012321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123210012131 is a prime.

It is a super-2 number, since 2×123210012131² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123210012137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61605006065 + 61605006066.

It is an arithmetic number, because the mean of its divisors is an integer number (61605006066).

Almost surely, 2^123210012131 is an apocalyptic number.

123210012131 is a deficient number, since it is larger than the sum of its proper divisors (1).

123210012131 is an equidigital number, since it uses as much as digits as its factorization.

123210012131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 123210012131 its reverse (131210012321), we get a palindrome (254420024452).

The spelling of 123210012131 in words is "one hundred twenty-three billion, two hundred ten million, twelve thousand, one hundred thirty-one".