123112133220 has 24 divisors (see below), whose sum is σ = 344713973184. Its totient is φ = 32829902176.

The previous prime is 123112133219. The next prime is 123112133251. The reversal of 123112133220 is 22331211321.

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, 1025934384 + ... + 1025934503.

It is an arithmetic number, because the mean of its divisors is an integer number (14363082216).

Almost surely, 2^123112133220 is an apocalyptic number.

123112133220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123112133220 is an abundant number, since it is smaller than the sum of its proper divisors (221601839964).

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

123112133220 is a wasteful number, since it uses less digits than its factorization.

123112133220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2051868899 (or 2051868897 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 123112133220 its reverse (22331211321), we get a palindrome (145443344541).

The spelling of 123112133220 in words is "one hundred twenty-three billion, one hundred twelve million, one hundred thirty-three thousand, two hundred twenty".