123012320015510 has 16 divisors (see below), whose sum is σ = 222056623530000. Its totient is φ = 49063939672416.

The previous prime is 123012320015461. The next prime is 123012320015569. The reversal of 123012320015510 is 15510023210321.

It is a self number, because there is not a number n which added to its sum of digits gives 123012320015510.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17623538060 + ... + 17623545039.

It is an arithmetic number, because the mean of its divisors is an integer number (13878538970625).

Almost surely, 2^{123012320015510} is an apocalyptic number.

123012320015510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123012320015510 is a deficient number, since it is larger than the sum of its proper divisors (99044303514490).

123012320015510 is a wasteful number, since it uses less digits than its factorization.

123012320015510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35247083455.

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 123012320015510 its reverse (15510023210321), we get a palindrome (138522343225831).

The spelling of 123012320015510 in words is "one hundred twenty-three trillion, twelve billion, three hundred twenty million, fifteen thousand, five hundred ten".