12155522412 has 24 divisors (see below), whose sum is σ = 30941330112. Its totient is φ = 3683491600.

The previous prime is 12155522341. The next prime is 12155522419. The reversal of 12155522412 is 21422555121.

It is a self number, because there is not a number n which added to its sum of digits gives 12155522412.

It is not an unprimeable number, because it can be changed into a prime (12155522419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46043514 + ... + 46043777.

It is an arithmetic number, because the mean of its divisors is an integer number (1289222088).

Almost surely, 2^12155522412 is an apocalyptic number.

12155522412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12155522412 is an abundant number, since it is smaller than the sum of its proper divisors (18785807700).

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

12155522412 is a wasteful number, since it uses less digits than its factorization.

12155522412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92087309 (or 92087307 counting only the distinct ones).

The product of its digits is 8000, while the sum is 30.

The spelling of 12155522412 in words is "twelve billion, one hundred fifty-five million, five hundred twenty-two thousand, four hundred twelve".