12123358720 has 80 divisors (see below), whose sum is σ = 31710233808. Its totient is φ = 4408483840.

The previous prime is 12123358717. The next prime is 12123358781. The reversal of 12123358720 is 2785332121.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

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, 187099 + ... + 243418.

Almost surely, 2^12123358720 is an apocalyptic number.

12123358720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12123358720 is an abundant number, since it is smaller than the sum of its proper divisors (19586875088).

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

12123358720 is an equidigital number, since it uses as much as digits as its factorization.

12123358720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430551 (or 430535 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The spelling of 12123358720 in words is "twelve billion, one hundred twenty-three million, three hundred fifty-eight thousand, seven hundred twenty".