123939999012 has 24 divisors (see below), whose sum is σ = 289210422816. Its totient is φ = 41310891328.

The previous prime is 123939998933. The next prime is 123939999031. The reversal of 123939999012 is 210999939321.

It is a super-2 number, since 2×123939999012² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87498 + ... + 505505.

It is an arithmetic number, because the mean of its divisors is an integer number (12050434284).

Almost surely, 2^123939999012 is an apocalyptic number.

123939999012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123939999012 is an abundant number, since it is smaller than the sum of its proper divisors (165270423804).

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

123939999012 is a wasteful number, since it uses less digits than its factorization.

123939999012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610427 (or 610425 counting only the distinct ones).

The product of its (nonzero) digits is 2125764, while the sum is 57.

The spelling of 123939999012 in words is "one hundred twenty-three billion, nine hundred thirty-nine million, nine hundred ninety-nine thousand, twelve".