22222006021 has 2 divisors, whose sum is σ = 22222006022. Its totient is φ = 22222006020.

The previous prime is 22222005941. The next prime is 22222006039. The reversal of 22222006021 is 12060022222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20641068900 + 1580937121 = 143670^2 + 39761^2 .

It is a cyclic number.

It is not a de Polignac number, because 22222006021 - 2¹⁵ = 22221973253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22222006021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22222006091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11111003010 + 11111003011.

It is an arithmetic number, because the mean of its divisors is an integer number (11111003011).

Almost surely, 2^22222006021 is an apocalyptic number.

It is an amenable number.

22222006021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22222006021 is an equidigital number, since it uses as much as digits as its factorization.

22222006021 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 22222006021 its reverse (12060022222), we get a palindrome (34282028243).

The spelling of 22222006021 in words is "twenty-two billion, two hundred twenty-two million, six thousand, twenty-one".