21022122201097 has 2 divisors, whose sum is σ = 21022122201098. Its totient is φ = 21022122201096.

The previous prime is 21022122201089. The next prime is 21022122201107. The reversal of 21022122201097 is 79010222122012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17908224339721 + 3113897861376 = 4231811^2 + 1764624^2 .

It is a cyclic number.

It is not a de Polignac number, because 21022122201097 - 2³ = 21022122201089 is a prime.

It is a super-2 number, since 2×21022122201097² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21022122201007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511061100548 + 10511061100549.

It is an arithmetic number, because the mean of its divisors is an integer number (10511061100549).

Almost surely, 2^{21022122201097} is an apocalyptic number.

It is an amenable number.

21022122201097 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022122201097 is an equidigital number, since it uses as much as digits as its factorization.

21022122201097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 31.

The spelling of 21022122201097 in words is "twenty-one trillion, twenty-two billion, one hundred twenty-two million, two hundred one thousand, ninety-seven".