123013205233551 has 12 divisors (see below), whose sum is σ = 178257077684400. Its totient is φ = 81745109585280.

The previous prime is 123013205233531. The next prime is 123013205233579. The reversal of 123013205233551 is 155332502310321.

123013205233551 is a `hidden beast` number, since 1 + 2 + 3 + 0 + 1 + 3 + 20 + 52 + 33 + 551 = 666.

It is not a de Polignac number, because 123013205233551 - 2⁶ = 123013205233487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123013205233531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21974489026 + ... + 21974494623.

It is an arithmetic number, because the mean of its divisors is an integer number (14854756473700).

Almost surely, 2^{123013205233551} is an apocalyptic number.

123013205233551 is a deficient number, since it is larger than the sum of its proper divisors (55243872450849).

123013205233551 is a wasteful number, since it uses less digits than its factorization.

123013205233551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43948983966 (or 43948983963 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 36.

Adding to 123013205233551 its reverse (155332502310321), we get a palindrome (278345707543872).

The spelling of 123013205233551 in words is "one hundred twenty-three trillion, thirteen billion, two hundred five million, two hundred thirty-three thousand, five hundred fifty-one".