123315300203021 has 32 divisors (see below), whose sum is σ = 134688614052960. Its totient is φ = 112427572838400.

The previous prime is 123315300202979. The next prime is 123315300203027. The reversal of 123315300203021 is 120302003513321.

It can be written as a sum of positive squares in 16 ways, for example, as 1955002389796 + 121360297813225 = 1398214^2 + 11016365^2 .

It is a cyclic number.

It is not a de Polignac number, because 123315300203021 - 2⁶ = 123315300202957 is a prime.

It is a super-2 number, since 2×123315300203021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123315300203027) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 609438215 + ... + 609640523.

It is an arithmetic number, because the mean of its divisors is an integer number (4209019189155).

Almost surely, 2^{123315300203021} is an apocalyptic number.

It is an amenable number.

123315300203021 is a deficient number, since it is larger than the sum of its proper divisors (11373313849939).

123315300203021 is a wasteful number, since it uses less digits than its factorization.

123315300203021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206625.

The product of its (nonzero) digits is 3240, while the sum is 26.

Adding to 123315300203021 its reverse (120302003513321), we get a palindrome (243617303716342).

The spelling of 123315300203021 in words is "one hundred twenty-three trillion, three hundred fifteen billion, three hundred million, two hundred three thousand, twenty-one".