123112130012 has 48 divisors (see below), whose sum is σ = 218680130592. Its totient is φ = 60640419840.

The previous prime is 123112129967. The next prime is 123112130069. The reversal of 123112130012 is 210031211321.

It is a super-2 number, since 2×123112130012² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62397458 + ... + 62399430.

It is an arithmetic number, because the mean of its divisors is an integer number (4555836054).

Almost surely, 2^123112130012 is an apocalyptic number.

It is an amenable number.

123112130012 is a deficient number, since it is larger than the sum of its proper divisors (95568000580).

123112130012 is a wasteful number, since it uses less digits than its factorization.

123112130012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2918 (or 2916 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 123112130012 its reverse (210031211321), we get a palindrome (333143341333).

The spelling of 123112130012 in words is "one hundred twenty-three billion, one hundred twelve million, one hundred thirty thousand, twelve".