123331213131 has 32 divisors (see below), whose sum is σ = 199059471360. Its totient is φ = 66305627136.

The previous prime is 123331213087. The next prime is 123331213133. The reversal of 123331213131 is 131312133321.

It is not a de Polignac number, because 123331213131 - 2²³ = 123322824523 is a prime.

It is a super-2 number, since 2×123331213131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123331213133) 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, 959490 + ... + 1080408.

It is an arithmetic number, because the mean of its divisors is an integer number (6220608480).

Almost surely, 2^123331213131 is an apocalyptic number.

123331213131 is a deficient number, since it is larger than the sum of its proper divisors (75728258229).

123331213131 is a wasteful number, since it uses less digits than its factorization.

123331213131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123803.

The product of its digits is 972, while the sum is 24.

Adding to 123331213131 its reverse (131312133321), we get a palindrome (254643346452).

The spelling of 123331213131 in words is "one hundred twenty-three billion, three hundred thirty-one million, two hundred thirteen thousand, one hundred thirty-one".