12156822720 has 336 divisors, whose sum is σ = 48046160448. Its totient is φ = 2763694080.

The previous prime is 12156822709. The next prime is 12156822773. The reversal of 12156822720 is 2722865121.

It is a happy number.

12156822720 is a `hidden beast` number, since 1 + 2 + 1 + 568 + 22 + 72 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (336).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3969990 + ... + 3973050.

Almost surely, 2^12156822720 is an apocalyptic number.

12156822720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12156822720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24023080224).

12156822720 is an abundant number, since it is smaller than the sum of its proper divisors (35889337728).

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

12156822720 is a wasteful number, since it uses less digits than its factorization.

12156822720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3288 (or 3275 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The spelling of 12156822720 in words is "twelve billion, one hundred fifty-six million, eight hundred twenty-two thousand, seven hundred twenty".