123201111520515 has 32 divisors (see below), whose sum is σ = 225282468888576. Its totient is φ = 56320399025280.

The previous prime is 123201111520397. The next prime is 123201111520523. The reversal of 123201111520515 is 515025111102321.

It is not a de Polignac number, because 123201111520515 - 2⁷ = 123201111520387 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82493725 + ... + 83973905.

It is an arithmetic number, because the mean of its divisors is an integer number (7040077152768).

Almost surely, 2^{123201111520515} is an apocalyptic number.

123201111520515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123201111520515 is a deficient number, since it is larger than the sum of its proper divisors (102081357368061).

123201111520515 is a wasteful number, since it uses less digits than its factorization.

123201111520515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2272899.

The product of its (nonzero) digits is 3000, while the sum is 30.

Adding to 123201111520515 its reverse (515025111102321), we get a palindrome (638226222622836).

The spelling of 123201111520515 in words is "one hundred twenty-three trillion, two hundred one billion, one hundred eleven million, five hundred twenty thousand, five hundred fifteen".