202222020212221 has 4 divisors (see below), whose sum is σ = 202222794437244. Its totient is φ = 202221245987200.

The previous prime is 202222020212183. The next prime is 202222020212227. The reversal of 202222020212221 is 122212020222202.

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 33872562960196 + 168349457252025 = 5820014^2 + 12974955^2 .

It is a cyclic number.

It is not a de Polignac number, because 202222020212221 - 2⁴⁵ = 167037648123389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202222020212192 and 202222020212201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202222020212227) 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, 386720590 + ... + 387243151.

It is an arithmetic number, because the mean of its divisors is an integer number (50555698609311).

Almost surely, 2^{202222020212221} is an apocalyptic number.

It is an amenable number.

202222020212221 is a deficient number, since it is larger than the sum of its proper divisors (774225023).

202222020212221 is an equidigital number, since it uses as much as digits as its factorization.

202222020212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774225022.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 202222020212221 its reverse (122212020222202), we get a palindrome (324434040434423).

The spelling of 202222020212221 in words is "two hundred two trillion, two hundred twenty-two billion, twenty million, two hundred twelve thousand, two hundred twenty-one".