123013311621503 has 6 divisors (see below), whose sum is σ = 125378110067784. Its totient is φ = 120692305739096.

The previous prime is 123013311621493. The next prime is 123013311621559. The reversal of 123013311621503 is 305126113310321.

It is not a de Polignac number, because 123013311621503 - 2²⁰ = 123013310572927 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123013311621503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123013311626503) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21896279075 + ... + 21896284692.

It is an arithmetic number, because the mean of its divisors is an integer number (20896351677964).

Almost surely, 2^{123013311621503} is an apocalyptic number.

123013311621503 is a deficient number, since it is larger than the sum of its proper divisors (2364798446281).

123013311621503 is an frugal number, since it uses more digits than its factorization.

123013311621503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43792563873 (or 43792563820 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 32.

Adding to 123013311621503 its reverse (305126113310321), we get a palindrome (428139424931824).

The spelling of 123013311621503 in words is "one hundred twenty-three trillion, thirteen billion, three hundred eleven million, six hundred twenty-one thousand, five hundred three".