2202221122021 has 2 divisors, whose sum is σ = 2202221122022. Its totient is φ = 2202221122020.

The previous prime is 2202221122007. The next prime is 2202221122043. The reversal of 2202221122021 is 1202211222022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2183629799521 + 18591322500 = 1477711^2 + 136350^2 .

It is a cyclic number.

It is not a de Polignac number, because 2202221122021 - 2⁹ = 2202221121509 is a prime.

It is a super-2 number, since 2×2202221122021² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2202221122021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2202221122091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1101110561010 + 1101110561011.

It is an arithmetic number, because the mean of its divisors is an integer number (1101110561011).

Almost surely, 2^{2202221122021} is an apocalyptic number.

It is an amenable number.

2202221122021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2202221122021 is an equidigital number, since it uses as much as digits as its factorization.

2202221122021 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 19.

Adding to 2202221122021 its reverse (1202211222022), we get a palindrome (3404432344043).

The spelling of 2202221122021 in words is "two trillion, two hundred two billion, two hundred twenty-one million, one hundred twenty-two thousand, twenty-one".