202212221221 has 4 divisors (see below), whose sum is σ = 202348576192. Its totient is φ = 202075866252.

The previous prime is 202212221219. The next prime is 202212221227. The reversal of 202212221221 is 122122212202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 202212221221 - 2¹ = 202212221219 is a prime.

It is a super-2 number, since 2×202212221221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202212221227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68175261 + ... + 68178226.

It is an arithmetic number, because the mean of its divisors is an integer number (50587144048).

Almost surely, 2^202212221221 is an apocalyptic number.

It is an amenable number.

202212221221 is a deficient number, since it is larger than the sum of its proper divisors (136354971).

202212221221 is a wasteful number, since it uses less digits than its factorization.

202212221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136354970.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 202212221221 its reverse (122122212202), we get a palindrome (324334433423).

The spelling of 202212221221 in words is "two hundred two billion, two hundred twelve million, two hundred twenty-one thousand, two hundred twenty-one".