20021122097 has 2 divisors, whose sum is σ = 20021122098. Its totient is φ = 20021122096.

The previous prime is 20021122061. The next prime is 20021122157. The reversal of 20021122097 is 79022112002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19930662976 + 90459121 = 141176^2 + 9511^2 .

It is a cyclic number.

It is not a de Polignac number, because 20021122097 - 2²² = 20016927793 is a prime.

It is not a weakly prime, because it can be changed into another prime (20021128097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010561048 + 10010561049.

It is an arithmetic number, because the mean of its divisors is an integer number (10010561049).

Almost surely, 2^20021122097 is an apocalyptic number.

It is an amenable number.

20021122097 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021122097 is an equidigital number, since it uses as much as digits as its factorization.

20021122097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 26.

Adding to 20021122097 its reverse (79022112002), we get a palindrome (99043234099).

The spelling of 20021122097 in words is "twenty billion, twenty-one million, one hundred twenty-two thousand, ninety-seven".