22202011121221 has 2 divisors, whose sum is σ = 22202011121222. Its totient is φ = 22202011121220.

The previous prime is 22202011121203. The next prime is 22202011121233. The reversal of 22202011121221 is 12212111020222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18338864112100 + 3863147009121 = 4282390^2 + 1965489^2 .

It is a cyclic number.

It is not a de Polignac number, because 22202011121221 - 2⁷ = 22202011121093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22202011121201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11101005560610 + 11101005560611.

It is an arithmetic number, because the mean of its divisors is an integer number (11101005560611).

Almost surely, 2^{22202011121221} is an apocalyptic number.

It is an amenable number.

22202011121221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22202011121221 is an equidigital number, since it uses as much as digits as its factorization.

22202011121221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 22202011121221 its reverse (12212111020222), we get a palindrome (34414122141443).

The spelling of 22202011121221 in words is "twenty-two trillion, two hundred two billion, eleven million, one hundred twenty-one thousand, two hundred twenty-one".