12221551424 has 28 divisors (see below), whose sum is σ = 24256313184. Its totient is φ = 6109724544.

The previous prime is 12221551411. The next prime is 12221551427. The reversal of 12221551424 is 42415512221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221551427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 470357 + ... + 495659.

Almost surely, 2^12221551424 is an apocalyptic number.

It is an amenable number.

12221551424 is a deficient number, since it is larger than the sum of its proper divisors (12034761760).

12221551424 is an equidigital number, since it uses as much as digits as its factorization.

12221551424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32862 (or 32852 counting only the distinct ones).

The product of its digits is 6400, while the sum is 29.

The spelling of 12221551424 in words is "twelve billion, two hundred twenty-one million, five hundred fifty-one thousand, four hundred twenty-four".