12120805572 has 24 divisors (see below), whose sum is σ = 28556463936. Its totient is φ = 4001042208.

The previous prime is 12120805549. The next prime is 12120805573. The reversal of 12120805572 is 27550802121.

It is not an unprimeable number, because it can be changed into a prime (12120805573) 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, 4902003 + ... + 4904474.

It is an arithmetic number, because the mean of its divisors is an integer number (1189852664).

Almost surely, 2^12120805572 is an apocalyptic number.

12120805572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12120805572 is an abundant number, since it is smaller than the sum of its proper divisors (16435658364).

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

12120805572 is a wasteful number, since it uses less digits than its factorization.

12120805572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9806587 (or 9806585 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 33.

The spelling of 12120805572 in words is "twelve billion, one hundred twenty million, eight hundred five thousand, five hundred seventy-two".