202202222231221 has 2 divisors, whose sum is σ = 202202222231222. Its totient is φ = 202202222231220.

The previous prime is 202202222231159. The next prime is 202202222231239. The reversal of 202202222231221 is 122132222202202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188267761944900 + 13934460286321 = 13721070^2 + 3732889^2 .

It is a cyclic number.

It is not a de Polignac number, because 202202222231221 - 2⁹ = 202202222230709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202202222231291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101101111115610 + 101101111115611.

It is an arithmetic number, because the mean of its divisors is an integer number (101101111115611).

Almost surely, 2^{202202222231221} is an apocalyptic number.

It is an amenable number.

202202222231221 is a deficient number, since it is larger than the sum of its proper divisors (1).

202202222231221 is an equidigital number, since it uses as much as digits as its factorization.

202202222231221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 202202222231221 its reverse (122132222202202), we get a palindrome (324334444433423).

The spelling of 202202222231221 in words is "two hundred two trillion, two hundred two billion, two hundred twenty-two million, two hundred thirty-one thousand, two hundred twenty-one".