123012313333531 has 2 divisors, whose sum is σ = 123012313333532. Its totient is φ = 123012313333530.

The previous prime is 123012313333517. The next prime is 123012313333549. The reversal of 123012313333531 is 135333313210321.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123012313333531 - 2¹¹ = 123012313331483 is a prime.

It is a super-2 number, since 2×123012313333531² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123012313333561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61506156666765 + 61506156666766.

It is an arithmetic number, because the mean of its divisors is an integer number (61506156666766).

Almost surely, 2^{123012313333531} is an apocalyptic number.

123012313333531 is a deficient number, since it is larger than the sum of its proper divisors (1).

123012313333531 is an equidigital number, since it uses as much as digits as its factorization.

123012313333531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43740, while the sum is 34.

Adding to 123012313333531 its reverse (135333313210321), we get a palindrome (258345626543852).

The spelling of 123012313333531 in words is "one hundred twenty-three trillion, twelve billion, three hundred thirteen million, three hundred thirty-three thousand, five hundred thirty-one".