123120101131 has 2 divisors, whose sum is σ = 123120101132. Its totient is φ = 123120101130.

The previous prime is 123120101129. The next prime is 123120101161. The reversal of 123120101131 is 131101021321.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123120101131 - 2¹ = 123120101129 is a prime.

It is a super-2 number, since 2×123120101131² (a number of 23 digits) contains 22 as substring.

Together with 123120101129, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (123120101161) 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 as a sum of consecutive naturals, namely, 61560050565 + 61560050566.

It is an arithmetic number, because the mean of its divisors is an integer number (61560050566).

Almost surely, 2^123120101131 is an apocalyptic number.

123120101131 is a deficient number, since it is larger than the sum of its proper divisors (1).

123120101131 is an equidigital number, since it uses as much as digits as its factorization.

123120101131 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 16.

Adding to 123120101131 its reverse (131101021321), we get a palindrome (254221122452).

The spelling of 123120101131 in words is "one hundred twenty-three billion, one hundred twenty million, one hundred one thousand, one hundred thirty-one".