1222553221 has 8 divisors (see below), whose sum is σ = 1241718624. Its totient is φ = 1203414960.

The previous prime is 1222553197. The next prime is 1222553239. The reversal of 1222553221 is 1223552221.

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 1222553221 - 2⁷ = 1222553093 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 (1222553251) 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, 96051 + ... + 108031.

It is an arithmetic number, because the mean of its divisors is an integer number (155214828).

Almost surely, 2^1222553221 is an apocalyptic number.

It is an amenable number.

1222553221 is a deficient number, since it is larger than the sum of its proper divisors (19165403).

1222553221 is a wasteful number, since it uses less digits than its factorization.

1222553221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13571.

The product of its digits is 2400, while the sum is 25.

The square root of 1222553221 is about 34965.0285428169. The cubic root of 1222553221 is about 1069.2746185546.

The spelling of 1222553221 in words is "one billion, two hundred twenty-two million, five hundred fifty-three thousand, two hundred twenty-one".