22101112121021 has 2 divisors, whose sum is σ = 22101112121022. Its totient is φ = 22101112121020.

The previous prime is 22101112120951. The next prime is 22101112121057. The reversal of 22101112121021 is 12012121110122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15624667368025 + 6476444752996 = 3952805^2 + 2544886^2 .

It is a cyclic number.

It is not a de Polignac number, because 22101112121021 - 2²² = 22101107926717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22101112421021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11050556060510 + 11050556060511.

It is an arithmetic number, because the mean of its divisors is an integer number (11050556060511).

Almost surely, 2^{22101112121021} is an apocalyptic number.

It is an amenable number.

22101112121021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22101112121021 is an equidigital number, since it uses as much as digits as its factorization.

22101112121021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 22101112121021 its reverse (12012121110122), we get a palindrome (34113233231143).

The spelling of 22101112121021 in words is "twenty-two trillion, one hundred one billion, one hundred twelve million, one hundred twenty-one thousand, twenty-one".