202212221 has 4 divisors (see below), whose sum is σ = 203569500. Its totient is φ = 200854944.

The previous prime is 202212211. The next prime is 202212233. The reversal of 202212221 is 122212202.

202212221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 109956196 + 92256025 = 10486^2 + 9605^2 .

It is a cyclic number.

It is not a de Polignac number, because 202212221 - 2¹⁴ = 202195837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202212196 and 202212205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202212211) 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, 678416 + ... + 678713.

It is an arithmetic number, because the mean of its divisors is an integer number (50892375).

Almost surely, 2^202212221 is an apocalyptic number.

It is an amenable number.

202212221 is a deficient number, since it is larger than the sum of its proper divisors (1357279).

202212221 is a wasteful number, since it uses less digits than its factorization.

202212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357278.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 202212221 is about 14220.1343523892. The cubic root of 202212221 is about 586.9518373342.

Adding to 202212221 its reverse (122212202), we get a palindrome (324424423).

The spelling of 202212221 in words is "two hundred two million, two hundred twelve thousand, two hundred twenty-one".