22412821397 has 2 divisors, whose sum is σ = 22412821398. Its totient is φ = 22412821396.

The previous prime is 22412821393. The next prime is 22412821429. The reversal of 22412821397 is 79312821422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17607697636 + 4805123761 = 132694^2 + 69319^2 .

It is a cyclic number.

It is not a de Polignac number, because 22412821397 - 2² = 22412821393 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22412821393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11206410698 + 11206410699.

It is an arithmetic number, because the mean of its divisors is an integer number (11206410699).

Almost surely, 2^22412821397 is an apocalyptic number.

It is an amenable number.

22412821397 is a deficient number, since it is larger than the sum of its proper divisors (1).

22412821397 is an equidigital number, since it uses as much as digits as its factorization.

22412821397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 41.

The spelling of 22412821397 in words is "twenty-two billion, four hundred twelve million, eight hundred twenty-one thousand, three hundred ninety-seven".