222110222021 has 2 divisors, whose sum is σ = 222110222022. Its totient is φ = 222110222020.

The previous prime is 222110222011. The next prime is 222110222023. The reversal of 222110222021 is 120222011222.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208767661921 + 13342560100 = 456911^2 + 115510^2 .

It is a cyclic number.

It is not a de Polignac number, because 222110222021 - 2²⁶ = 222043113157 is a prime.

Together with 222110222023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222110222023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111055111010 + 111055111011.

It is an arithmetic number, because the mean of its divisors is an integer number (111055111011).

Almost surely, 2^222110222021 is an apocalyptic number.

It is an amenable number.

222110222021 is a deficient number, since it is larger than the sum of its proper divisors (1).

222110222021 is an equidigital number, since it uses as much as digits as its factorization.

222110222021 is an evil number, because the sum of its binary digits is even.

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

Adding to 222110222021 its reverse (120222011222), we get a palindrome (342332233243).

The spelling of 222110222021 in words is "two hundred twenty-two billion, one hundred ten million, two hundred twenty-two thousand, twenty-one".