22202022221 has 2 divisors, whose sum is σ = 22202022222. Its totient is φ = 22202022220.

The previous prime is 22202022209. The next prime is 22202022233. The reversal of 22202022221 is 12222020222.

It is a balanced prime because it is at equal distance from previous prime (22202022209) and next prime (22202022233).

It can be written as a sum of positive squares in only one way, i.e., 21302862025 + 899160196 = 145955^2 + 29986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22202022221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22202022221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22202022121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11101011110 + 11101011111.

It is an arithmetic number, because the mean of its divisors is an integer number (11101011111).

Almost surely, 2^22202022221 is an apocalyptic number.

It is an amenable number.

22202022221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22202022221 is an equidigital number, since it uses as much as digits as its factorization.

22202022221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 22202022221 its reverse (12222020222), we get a palindrome (34424042443).

The spelling of 22202022221 in words is "twenty-two billion, two hundred two million, twenty-two thousand, two hundred twenty-one".