2022222221 has 2 divisors, whose sum is σ = 2022222222. Its totient is φ = 2022222220.

The previous prime is 2022222197. The next prime is 2022222239. The reversal of 2022222221 is 1222222202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1191975625 + 830246596 = 34525^2 + 28814^2 .

It is a cyclic number.

It is not a de Polignac number, because 2022222221 - 2¹⁰ = 2022221197 is a prime.

It is a super-2 number, since 2×2022222221² = 8178765422212345682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2022222221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2022222271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1011111110 + 1011111111.

It is an arithmetic number, because the mean of its divisors is an integer number (1011111111).

Almost surely, 2^2022222221 is an apocalyptic number.

It is an amenable number.

2022222221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2022222221 is an equidigital number, since it uses as much as digits as its factorization.

2022222221 is an evil number, because the sum of its binary digits is even.

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

The square root of 2022222221 is about 44969.1251971839. The cubic root of 2022222221 is about 1264.5702469318.

Adding to 2022222221 its reverse (1222222202), we get a palindrome (3244444423).

The spelling of 2022222221 in words is "two billion, twenty-two million, two hundred twenty-two thousand, two hundred twenty-one".