22212021397 has 2 divisors, whose sum is σ = 22212021398. Its totient is φ = 22212021396.

The previous prime is 22212021331. The next prime is 22212021427. The reversal of 22212021397 is 79312021222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18196391236 + 4015630161 = 134894^2 + 63369^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22212021397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22212021197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11106010698 + 11106010699.

It is an arithmetic number, because the mean of its divisors is an integer number (11106010699).

Almost surely, 2^22212021397 is an apocalyptic number.

It is an amenable number.

22212021397 is a deficient number, since it is larger than the sum of its proper divisors (1).

22212021397 is an equidigital number, since it uses as much as digits as its factorization.

22212021397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 31.

The spelling of 22212021397 in words is "twenty-two billion, two hundred twelve million, twenty-one thousand, three hundred ninety-seven".