22002122021221 has 2 divisors, whose sum is σ = 22002122021222. Its totient is φ = 22002122021220.

The previous prime is 22002122021167. The next prime is 22002122021239. The reversal of 22002122021221 is 12212022120022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18442824729121 + 3559297292100 = 4294511^2 + 1886610^2 .

It is a cyclic number.

It is not a de Polignac number, because 22002122021221 - 2¹⁹ = 22002121496933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22002122021251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11001061010610 + 11001061010611.

It is an arithmetic number, because the mean of its divisors is an integer number (11001061010611).

Almost surely, 2^{22002122021221} is an apocalyptic number.

It is an amenable number.

22002122021221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22002122021221 is an equidigital number, since it uses as much as digits as its factorization.

22002122021221 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 19.

Adding to 22002122021221 its reverse (12212022120022), we get a palindrome (34214144141243).

The spelling of 22002122021221 in words is "twenty-two trillion, two billion, one hundred twenty-two million, twenty-one thousand, two hundred twenty-one".