123131210231320 has 64 divisors (see below), whose sum is σ = 288083473452000. Its totient is φ = 47307728068608.

The previous prime is 123131210231311. The next prime is 123131210231347. The reversal of 123131210231320 is 23132012131321.

It is a super-3 number, since 3×123131210231320³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 274769890 + ... + 275217649.

Almost surely, 2^{123131210231320} is an apocalyptic number.

123131210231320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123131210231320 is an abundant number, since it is smaller than the sum of its proper divisors (164952263220680).

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

123131210231320 is a wasteful number, since it uses less digits than its factorization.

123131210231320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549987772 (or 549987768 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 123131210231320 its reverse (23132012131321), we get a palindrome (146263222362641).

The spelling of 123131210231320 in words is "one hundred twenty-three trillion, one hundred thirty-one billion, two hundred ten million, two hundred thirty-one thousand, three hundred twenty".