123131320012 has 24 divisors (see below), whose sum is σ = 216349056000. Its totient is φ = 61317413136.

The previous prime is 123131319989. The next prime is 123131320043. The reversal of 123131320012 is 210023131321.

It is a super-2 number, since 2×123131320012² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5689989 + ... + 5711587.

It is an arithmetic number, because the mean of its divisors is an integer number (9014544000).

Almost surely, 2^123131320012 is an apocalyptic number.

It is an amenable number.

123131320012 is a deficient number, since it is larger than the sum of its proper divisors (93217735988).

123131320012 is a wasteful number, since it uses less digits than its factorization.

123131320012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27285 (or 27283 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 123131320012 its reverse (210023131321), we get a palindrome (333154451333).

The spelling of 123131320012 in words is "one hundred twenty-three billion, one hundred thirty-one million, three hundred twenty thousand, twelve".