12154566721722 has 16 divisors (see below), whose sum is σ = 24310614369792. Its totient is φ = 4051275419520.

The previous prime is 12154566721657. The next prime is 12154566721723. The reversal of 12154566721722 is 22712766545121.

It is not an unprimeable number, because it can be changed into a prime (12154566721723) 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, 61598554 + ... + 61795557.

It is an arithmetic number, because the mean of its divisors is an integer number (1519413398112).

Almost surely, 2^{12154566721722} is an apocalyptic number.

12154566721722 is an abundant number, since it is smaller than the sum of its proper divisors (12156047648070).

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

12154566721722 is a wasteful number, since it uses less digits than its factorization.

12154566721722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123410533.

The product of its digits is 2822400, while the sum is 51.

The spelling of 12154566721722 in words is "twelve trillion, one hundred fifty-four billion, five hundred sixty-six million, seven hundred twenty-one thousand, seven hundred twenty-two".