2222645313221 has 4 divisors (see below), whose sum is σ = 2222785922700. Its totient is φ = 2222504703744.

The previous prime is 2222645313209. The next prime is 2222645313223. The reversal of 2222645313221 is 1223135462222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 178071340225 + 2044573972996 = 421985^2 + 1429886^2 .

It is a cyclic number.

It is not a de Polignac number, because 2222645313221 - 2³⁰ = 2221571571397 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 (2222645313223) 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, 70281026 + ... + 70312643.

It is an arithmetic number, because the mean of its divisors is an integer number (555696480675).

Almost surely, 2^{2222645313221} is an apocalyptic number.

It is an amenable number.

2222645313221 is a deficient number, since it is larger than the sum of its proper divisors (140609479).

2222645313221 is a wasteful number, since it uses less digits than its factorization.

2222645313221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140609478.

The product of its digits is 69120, while the sum is 35.

The spelling of 2222645313221 in words is "two trillion, two hundred twenty-two billion, six hundred forty-five million, three hundred thirteen thousand, two hundred twenty-one".