123040311321 has 16 divisors (see below), whose sum is σ = 172697963840. Its totient is φ = 77705256960.

The previous prime is 123040311293. The next prime is 123040311367. The reversal of 123040311321 is 123113040321.

It is not a de Polignac number, because 123040311321 - 2¹³ = 123040303129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123040311521) 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, 1164201 + ... + 1265481.

It is an arithmetic number, because the mean of its divisors is an integer number (10793622740).

Almost surely, 2^123040311321 is an apocalyptic number.

It is an amenable number.

123040311321 is a deficient number, since it is larger than the sum of its proper divisors (49657652519).

123040311321 is a wasteful number, since it uses less digits than its factorization.

123040311321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122616.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 123040311321 its reverse (123113040321), we get a palindrome (246153351642).

The spelling of 123040311321 in words is "one hundred twenty-three billion, forty million, three hundred eleven thousand, three hundred twenty-one".