123313431312 has 60 divisors (see below), whose sum is σ = 346209041724. Its totient is φ = 40973137920.

The previous prime is 123313431299. The next prime is 123313431337. The reversal of 123313431312 is 213134313321.

123313431312 is a `hidden beast` number, since 1 + 2 + 3 + 3 + 1 + 343 + 1 + 312 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5922225936 + 117391205376 = 76956^2 + 342624^2 .

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1322889 + ... + 1413032.

Almost surely, 2^123313431312 is an apocalyptic number.

123313431312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123313431312 is an abundant number, since it is smaller than the sum of its proper divisors (222895610412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123313431312 is a wasteful number, since it uses less digits than its factorization.

123313431312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2736248 (or 2736239 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

Adding to 123313431312 its reverse (213134313321), we get a palindrome (336447744633).

The spelling of 123313431312 in words is "one hundred twenty-three billion, three hundred thirteen million, four hundred thirty-one thousand, three hundred twelve".