12221637479 has 8 divisors (see below), whose sum is σ = 12588903600. Its totient is φ = 11857665600.

The previous prime is 12221637451. The next prime is 12221637481. The reversal of 12221637479 is 97473612221.

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

It is a cyclic number.

It is not a de Polignac number, because 12221637479 - 2²⁴ = 12204860263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221630479) 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, 816029 + ... + 830870.

It is an arithmetic number, because the mean of its divisors is an integer number (1573612950).

Almost surely, 2^12221637479 is an apocalyptic number.

12221637479 is a deficient number, since it is larger than the sum of its proper divisors (367266121).

12221637479 is a wasteful number, since it uses less digits than its factorization.

12221637479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1647121.

The product of its digits is 254016, while the sum is 44.

The spelling of 12221637479 in words is "twelve billion, two hundred twenty-one million, six hundred thirty-seven thousand, four hundred seventy-nine".