202212320221 has 4 divisors (see below), whose sum is σ = 202791725500. Its totient is φ = 201632914944.

The previous prime is 202212320179. The next prime is 202212320227. The reversal of 202212320221 is 122023212202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122023212202 = 2 ⋅61011606101.

It can be written as a sum of positive squares in 2 ways, for example, as 132394827321 + 69817492900 = 363861^2 + 264230^2 .

It is a cyclic number.

It is not a de Polignac number, because 202212320221 - 2¹¹ = 202212318173 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 (202212320227) 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, 289702116 + ... + 289702813.

It is an arithmetic number, because the mean of its divisors is an integer number (50697931375).

Almost surely, 2^202212320221 is an apocalyptic number.

It is an amenable number.

202212320221 is a deficient number, since it is larger than the sum of its proper divisors (579405279).

202212320221 is an equidigital number, since it uses as much as digits as its factorization.

202212320221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579405278.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 202212320221 its reverse (122023212202), we get a palindrome (324235532423).

The spelling of 202212320221 in words is "two hundred two billion, two hundred twelve million, three hundred twenty thousand, two hundred twenty-one".