22011120210221 has 2 divisors, whose sum is σ = 22011120210222. Its totient is φ = 22011120210220.

The previous prime is 22011120210109. The next prime is 22011120210263. The reversal of 22011120210221 is 12201202111022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16025121853321 + 5985998356900 = 4003139^2 + 2446630^2 .

It is a cyclic number.

It is not a de Polignac number, because 22011120210221 - 2³⁸ = 21736242303277 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22011120210221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22011120215221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11005560105110 + 11005560105111.

It is an arithmetic number, because the mean of its divisors is an integer number (11005560105111).

Almost surely, 2^{22011120210221} is an apocalyptic number.

It is an amenable number.

22011120210221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22011120210221 is an equidigital number, since it uses as much as digits as its factorization.

22011120210221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 22011120210221 its reverse (12201202111022), we get a palindrome (34212322321243).

The spelling of 22011120210221 in words is "twenty-two trillion, eleven billion, one hundred twenty million, two hundred ten thousand, two hundred twenty-one".