22112122016221 has 2 divisors, whose sum is σ = 22112122016222. Its totient is φ = 22112122016220.

The previous prime is 22112122016213. The next prime is 22112122016249. The reversal of 22112122016221 is 12261022121122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21393677608900 + 718444407321 = 4625330^2 + 847611^2 .

It is a cyclic number.

It is not a de Polignac number, because 22112122016221 - 2³ = 22112122016213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22112122056221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11056061008110 + 11056061008111.

It is an arithmetic number, because the mean of its divisors is an integer number (11056061008111).

Almost surely, 2^{22112122016221} is an apocalyptic number.

It is an amenable number.

22112122016221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22112122016221 is an equidigital number, since it uses as much as digits as its factorization.

22112122016221 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 25.

Adding to 22112122016221 its reverse (12261022121122), we get a palindrome (34373144137343).

The spelling of 22112122016221 in words is "twenty-two trillion, one hundred twelve billion, one hundred twenty-two million, sixteen thousand, two hundred twenty-one".