22213222021 has 2 divisors, whose sum is σ = 22213222022. Its totient is φ = 22213222020.

The previous prime is 22213221983. The next prime is 22213222027. The reversal of 22213222021 is 12022231222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21671961796 + 541260225 = 147214^2 + 23265^2 .

It is a cyclic number.

It is not a de Polignac number, because 22213222021 - 2⁹ = 22213221509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22213222021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22213222027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11106611010 + 11106611011.

It is an arithmetic number, because the mean of its divisors is an integer number (11106611011).

Almost surely, 2^22213222021 is an apocalyptic number.

It is an amenable number.

22213222021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22213222021 is an equidigital number, since it uses as much as digits as its factorization.

22213222021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 22213222021 its reverse (12022231222), we get a palindrome (34235453243).

The spelling of 22213222021 in words is "twenty-two billion, two hundred thirteen million, two hundred twenty-two thousand, twenty-one".