202212222222121 has 4 divisors (see below), whose sum is σ = 208735197132544. Its totient is φ = 195689247311700.

The previous prime is 202212222222041. The next prime is 202212222222233. The reversal of 202212222222121 is 121222222212202.

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 202212222222121 - 2¹⁹ = 202212221697833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202212222225121) 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, 3261487455165 + ... + 3261487455226.

It is an arithmetic number, because the mean of its divisors is an integer number (52183799283136).

Almost surely, 2^{202212222222121} is an apocalyptic number.

It is an amenable number.

202212222222121 is a deficient number, since it is larger than the sum of its proper divisors (6522974910423).

202212222222121 is an equidigital number, since it uses as much as digits as its factorization.

202212222222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6522974910422.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 202212222222121 its reverse (121222222212202), we get a palindrome (323434444434323).

The spelling of 202212222222121 in words is "two hundred two trillion, two hundred twelve billion, two hundred twenty-two million, two hundred twenty-two thousand, one hundred twenty-one".