123131212304 has 20 divisors (see below), whose sum is σ = 242477655660. Its totient is φ = 60556333440.

The previous prime is 123131212297. The next prime is 123131212319. The reversal of 123131212304 is 403212131321.

It can be written as a sum of positive squares in 2 ways, for example, as 68350873600 + 54780338704 = 261440^2 + 234052^2 .

It is a super-3 number, since 3×123131212304³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 123131212304.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63078539 + ... + 63080490.

It is an arithmetic number, because the mean of its divisors is an integer number (12123882783).

Almost surely, 2^123131212304 is an apocalyptic number.

It is an amenable number.

123131212304 is a deficient number, since it is larger than the sum of its proper divisors (119346443356).

123131212304 is a wasteful number, since it uses less digits than its factorization.

123131212304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126159098 (or 126159092 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 123131212304 its reverse (403212131321), we get a palindrome (526343343625).

The spelling of 123131212304 in words is "one hundred twenty-three billion, one hundred thirty-one million, two hundred twelve thousand, three hundred four".