123242504012551 has 16 divisors (see below), whose sum is σ = 153653235563520. Its totient is φ = 96032967792480.

The previous prime is 123242504012527. The next prime is 123242504012557. The reversal of 123242504012551 is 155210405242321.

It is a cyclic number.

It is not a de Polignac number, because 123242504012551 - 2⁷ = 123242504012423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123242504012551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123242504012557) 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 in 15 ways as a sum of consecutive naturals, for example, 89899965 + ... + 91260553.

It is an arithmetic number, because the mean of its divisors is an integer number (9603327222720).

Almost surely, 2^{123242504012551} is an apocalyptic number.

123242504012551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123242504012551 is a deficient number, since it is larger than the sum of its proper divisors (30410731550969).

123242504012551 is a wasteful number, since it uses less digits than its factorization.

123242504012551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2536974.

The product of its (nonzero) digits is 96000, while the sum is 37.

Adding to 123242504012551 its reverse (155210405242321), we get a palindrome (278452909254872).

The spelling of 123242504012551 in words is "one hundred twenty-three trillion, two hundred forty-two billion, five hundred four million, twelve thousand, five hundred fifty-one".