22022121213221 has 2 divisors, whose sum is σ = 22022121213222. Its totient is φ = 22022121213220.

The previous prime is 22022121213203. The next prime is 22022121213241. The reversal of 22022121213221 is 12231212122022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17096446996225 + 4925674216996 = 4134785^2 + 2219386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22022121213221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22022121213241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11011060606610 + 11011060606611.

It is an arithmetic number, because the mean of its divisors is an integer number (11011060606611).

Almost surely, 2^{22022121213221} is an apocalyptic number.

It is an amenable number.

22022121213221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22022121213221 is an equidigital number, since it uses as much as digits as its factorization.

22022121213221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 22022121213221 its reverse (12231212122022), we get a palindrome (34253333335243).

The spelling of 22022121213221 in words is "twenty-two trillion, twenty-two billion, one hundred twenty-one million, two hundred thirteen thousand, two hundred twenty-one".