202212221121221 has 4 divisors (see below), whose sum is σ = 202212251775072. Its totient is φ = 202212190467372.

The previous prime is 202212221121203. The next prime is 202212221121247. The reversal of 202212221121221 is 122121122212202.

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 a de Polignac number, because none of the positive numbers 2^k-202212221121221 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 (202214221121221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 914441 + ... + 20131086.

It is an arithmetic number, because the mean of its divisors is an integer number (50553062943768).

Almost surely, 2^{202212221121221} is an apocalyptic number.

It is an amenable number.

202212221121221 is a deficient number, since it is larger than the sum of its proper divisors (30653851).

202212221121221 is an equidigital number, since it uses as much as digits as its factorization.

202212221121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30653850.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 202212221121221 its reverse (122121122212202), we get a palindrome (324333343333423).

The spelling of 202212221121221 in words is "two hundred two trillion, two hundred twelve billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred twenty-one".