123131331304 has 16 divisors (see below), whose sum is σ = 238832324100. Its totient is φ = 59442711552.

The previous prime is 123131331293. The next prime is 123131331343. The reversal of 123131331304 is 403133131321.

It can be written as a sum of positive squares in 2 ways, for example, as 122711491204 + 419840100 = 350302^2 + 20490^2 .

It is a super-2 number, since 2×123131331304² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265369017 + ... + 265369480.

Almost surely, 2^123131331304 is an apocalyptic number.

It is an amenable number.

123131331304 is a deficient number, since it is larger than the sum of its proper divisors (115700992796).

123131331304 is a wasteful number, since it uses less digits than its factorization.

123131331304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530738532 (or 530738528 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 123131331304 its reverse (403133131321), we get a palindrome (526264462625).

The spelling of 123131331304 in words is "one hundred twenty-three billion, one hundred thirty-one million, three hundred thirty-one thousand, three hundred four".