123311131320 has 128 divisors (see below), whose sum is σ = 421824594240. Its totient is φ = 28568002560.

The previous prime is 123311131319. The next prime is 123311131327. The reversal of 123311131320 is 23131113321.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123311131327) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2298351 + ... + 2351390.

Almost surely, 2^123311131320 is an apocalyptic number.

123311131320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123311131320 is an abundant number, since it is smaller than the sum of its proper divisors (298513462920).

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

123311131320 is a wasteful number, since it uses less digits than its factorization.

123311131320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4649785 (or 4649781 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 123311131320 its reverse (23131113321), we get a palindrome (146442244641).

The spelling of 123311131320 in words is "one hundred twenty-three billion, three hundred eleven million, one hundred thirty-one thousand, three hundred twenty".