210022222121 has 4 divisors (see below), whose sum is σ = 216797132544. Its totient is φ = 203247311700.

The previous prime is 210022222079. The next prime is 210022222133. The reversal of 210022222121 is 121222220012.

It is a happy number.

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 210022222121 - 2²⁶ = 209955113257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210022222121.

It is not an unprimeable number, because it can be changed into a prime (210022222141) 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, 3387455165 + ... + 3387455226.

It is an arithmetic number, because the mean of its divisors is an integer number (54199283136).

Almost surely, 2^210022222121 is an apocalyptic number.

It is an amenable number.

210022222121 is a deficient number, since it is larger than the sum of its proper divisors (6774910423).

210022222121 is an equidigital number, since it uses as much as digits as its factorization.

210022222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6774910422.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 210022222121 its reverse (121222220012), we get a palindrome (331244442133).

The spelling of 210022222121 in words is "two hundred ten billion, twenty-two million, two hundred twenty-two thousand, one hundred twenty-one".