123120131 has 2 divisors, whose sum is σ = 123120132. Its totient is φ = 123120130.

The previous prime is 123120091. The next prime is 123120139. The reversal of 123120131 is 131021321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123120131 is a prime.

It is a super-2 number, since 2×123120131² = 30317133314914322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123120139) 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, 61560065 + 61560066.

It is an arithmetic number, because the mean of its divisors is an integer number (61560066).

Almost surely, 2^123120131 is an apocalyptic number.

123120131 is a deficient number, since it is larger than the sum of its proper divisors (1).

123120131 is an equidigital number, since it uses as much as digits as its factorization.

123120131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 123120131 is about 11095.9511083999. The cubic root of 123120131 is about 497.4808369512.

Adding to 123120131 its reverse (131021321), we get a palindrome (254141452).

The spelling of 123120131 in words is "one hundred twenty-three million, one hundred twenty thousand, one hundred thirty-one".