12165607220 has 48 divisors (see below), whose sum is σ = 27525173760. Its totient is φ = 4489927296.

The previous prime is 12165607211. The next prime is 12165607243. The reversal of 12165607220 is 2270656121.

It is a super-2 number, since 2×12165607220² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 661469 + ... + 679611.

It is an arithmetic number, because the mean of its divisors is an integer number (573441120).

Almost surely, 2^12165607220 is an apocalyptic number.

12165607220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12165607220 is an abundant number, since it is smaller than the sum of its proper divisors (15359566540).

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

12165607220 is a wasteful number, since it uses less digits than its factorization.

12165607220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20744 (or 20742 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The spelling of 12165607220 in words is "twelve billion, one hundred sixty-five million, six hundred seven thousand, two hundred twenty".