123301321055515 has 16 divisors (see below), whose sum is σ = 148257373759488. Its totient is φ = 98443868832736.

The previous prime is 123301321055447. The next prime is 123301321055519. The reversal of 123301321055515 is 515550123103321.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123301321055515 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123301321055519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 291083202 + ... + 291506488.

It is an arithmetic number, because the mean of its divisors is an integer number (9266085859968).

Almost surely, 2^{123301321055515} is an apocalyptic number.

123301321055515 is a deficient number, since it is larger than the sum of its proper divisors (24956052703973).

123301321055515 is a wasteful number, since it uses less digits than its factorization.

123301321055515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539618.

The product of its (nonzero) digits is 67500, while the sum is 37.

Adding to 123301321055515 its reverse (515550123103321), we get a palindrome (638851444158836).

The spelling of 123301321055515 in words is "one hundred twenty-three trillion, three hundred one billion, three hundred twenty-one million, fifty-five thousand, five hundred fifteen".