12022556721 has 8 divisors (see below), whose sum is σ = 18320086464. Its totient is φ = 6870032400.

The previous prime is 12022556699. The next prime is 12022556743. The reversal of 12022556721 is 12765522021.

It is an interprime number because it is at equal distance from previous prime (12022556699) and next prime (12022556743).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12022556721 - 2⁶ = 12022556657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12022558721) 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, 286251330 + ... + 286251371.

It is an arithmetic number, because the mean of its divisors is an integer number (2290010808).

Almost surely, 2^12022556721 is an apocalyptic number.

It is an amenable number.

12022556721 is a deficient number, since it is larger than the sum of its proper divisors (6297529743).

12022556721 is an equidigital number, since it uses as much as digits as its factorization.

12022556721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572502711.

The product of its (nonzero) digits is 16800, while the sum is 33.

The spelling of 12022556721 in words is "twelve billion, twenty-two million, five hundred fifty-six thousand, seven hundred twenty-one".