22000021297 has 2 divisors, whose sum is σ = 22000021298. Its totient is φ = 22000021296.

The previous prime is 22000021279. The next prime is 22000021331. The reversal of 22000021297 is 79212000022.

Together with previous prime (22000021279) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22000008976 + 12321 = 148324^2 + 111^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22000021297 is a prime.

It is not a weakly prime, because it can be changed into another prime (22000021097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11000010648 + 11000010649.

It is an arithmetic number, because the mean of its divisors is an integer number (11000010649).

Almost surely, 2^22000021297 is an apocalyptic number.

It is an amenable number.

22000021297 is a deficient number, since it is larger than the sum of its proper divisors (1).

22000021297 is an equidigital number, since it uses as much as digits as its factorization.

22000021297 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 25.

The spelling of 22000021297 in words is "twenty-two billion, twenty-one thousand, two hundred ninety-seven".