123320901321 has 36 divisors (see below), whose sum is σ = 188980856064. Its totient is φ = 77411311200.

The previous prime is 123320901281. The next prime is 123320901343. The reversal of 123320901321 is 123109023321.

123320901321 is a `hidden beast` number, since 1 + 2 + 332 + 0 + 9 + 0 + 1 + 321 = 666.

It is not a de Polignac number, because 123320901321 - 2¹⁴ = 123320884937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123320901391) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 220516 + ... + 543386.

It is an arithmetic number, because the mean of its divisors is an integer number (5249468224).

Almost surely, 2^123320901321 is an apocalyptic number.

It is an amenable number.

123320901321 is a deficient number, since it is larger than the sum of its proper divisors (65659954743).

123320901321 is a wasteful number, since it uses less digits than its factorization.

123320901321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322982 (or 322942 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

Adding to 123320901321 its reverse (123109023321), we get a palindrome (246429924642).

The spelling of 123320901321 in words is "one hundred twenty-three billion, three hundred twenty million, nine hundred one thousand, three hundred twenty-one".