22110222020021 has 2 divisors, whose sum is σ = 22110222020022. Its totient is φ = 22110222020020.

The previous prime is 22110222019999. The next prime is 22110222020039. The reversal of 22110222020021 is 12002022201122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18416234119396 + 3693987900625 = 4291414^2 + 1921975^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22110222020021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22110222020521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11055111010010 + 11055111010011.

It is an arithmetic number, because the mean of its divisors is an integer number (11055111010011).

Almost surely, 2^{22110222020021} is an apocalyptic number.

It is an amenable number.

22110222020021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22110222020021 is an equidigital number, since it uses as much as digits as its factorization.

22110222020021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22110222020021 its reverse (12002022201122), we get a palindrome (34112244221143).

The spelling of 22110222020021 in words is "twenty-two trillion, one hundred ten billion, two hundred twenty-two million, twenty thousand, twenty-one".