123021244315531 has 2 divisors, whose sum is σ = 123021244315532. Its totient is φ = 123021244315530.

The previous prime is 123021244315507. The next prime is 123021244315577. The reversal of 123021244315531 is 135513442120321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123021244315531 - 2⁵ = 123021244315499 is a prime.

It is a super-2 number, since 2×123021244315531² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123021244313531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61510622157765 + 61510622157766.

It is an arithmetic number, because the mean of its divisors is an integer number (61510622157766).

Almost surely, 2^{123021244315531} is an apocalyptic number.

123021244315531 is a deficient number, since it is larger than the sum of its proper divisors (1).

123021244315531 is an equidigital number, since it uses as much as digits as its factorization.

123021244315531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 37.

Adding to 123021244315531 its reverse (135513442120321), we get a palindrome (258534686435852).

The spelling of 123021244315531 in words is "one hundred twenty-three trillion, twenty-one billion, two hundred forty-four million, three hundred fifteen thousand, five hundred thirty-one".