123013243553015 has 4 divisors (see below), whose sum is σ = 147615892263624. Its totient is φ = 98410594842408.

The previous prime is 123013243552987. The next prime is 123013243553033. The reversal of 123013243553015 is 510355342310321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123013243553015 - 2¹² = 123013243548919 is a prime.

It is a super-2 number, since 2×123013243553015² (a number of 29 digits) contains 22 as substring.

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 123013243553015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12301324355297 + ... + 12301324355306.

It is an arithmetic number, because the mean of its divisors is an integer number (36903973065906).

Almost surely, 2^{123013243553015} is an apocalyptic number.

123013243553015 is a deficient number, since it is larger than the sum of its proper divisors (24602648710609).

123013243553015 is an equidigital number, since it uses as much as digits as its factorization.

123013243553015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24602648710608.

The product of its (nonzero) digits is 162000, while the sum is 38.

Adding to 123013243553015 its reverse (510355342310321), we get a palindrome (633368585863336).

The spelling of 123013243553015 in words is "one hundred twenty-three trillion, thirteen billion, two hundred forty-three million, five hundred fifty-three thousand, fifteen".