12251553221 has 8 divisors (see below), whose sum is σ = 12884895744. Its totient is φ = 11626599600.

The previous prime is 12251553203. The next prime is 12251553253. The reversal of 12251553221 is 12235515221.

It is a happy number.

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 12251553221 - 2⁶ = 12251553157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12251513221) 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, 2094230 + ... + 2100071.

It is an arithmetic number, because the mean of its divisors is an integer number (1610611968).

Almost surely, 2^12251553221 is an apocalyptic number.

It is an amenable number.

12251553221 is a deficient number, since it is larger than the sum of its proper divisors (633342523).

12251553221 is a wasteful number, since it uses less digits than its factorization.

12251553221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4194451.

The product of its digits is 6000, while the sum is 29.

The spelling of 12251553221 in words is "twelve billion, two hundred fifty-one million, five hundred fifty-three thousand, two hundred twenty-one".