22122110221997 has 2 divisors, whose sum is σ = 22122110221998. Its totient is φ = 22122110221996.

The previous prime is 22122110221933. The next prime is 22122110222053. The reversal of 22122110221997 is 79912201122122.

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., 15441017404036 + 6681092817961 = 3929506^2 + 2584781^2 .

It is a cyclic number.

It is not a de Polignac number, because 22122110221997 - 2⁶ = 22122110221933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22122110221907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11061055110998 + 11061055110999.

It is an arithmetic number, because the mean of its divisors is an integer number (11061055110999).

Almost surely, 2^{22122110221997} is an apocalyptic number.

It is an amenable number.

22122110221997 is a deficient number, since it is larger than the sum of its proper divisors (1).

22122110221997 is an equidigital number, since it uses as much as digits as its factorization.

22122110221997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 41.

The spelling of 22122110221997 in words is "twenty-two trillion, one hundred twenty-two billion, one hundred ten million, two hundred twenty-one thousand, nine hundred ninety-seven".