222221110219897 has 2 divisors, whose sum is σ = 222221110219898. Its totient is φ = 222221110219896.

The previous prime is 222221110219883. The next prime is 222221110219981. The reversal of 222221110219897 is 798912011122222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198438751275241 + 23782358944656 = 14086829^2 + 4876716^2 .

It is a cyclic number.

It is not a de Polignac number, because 222221110219897 - 2¹¹ = 222221110217849 is a prime.

It is a super-2 number, since 2×222221110219897² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 222221110219897.

It is not a weakly prime, because it can be changed into another prime (222221110219847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111110555109948 + 111110555109949.

It is an arithmetic number, because the mean of its divisors is an integer number (111110555109949).

Almost surely, 2^{222221110219897} is an apocalyptic number.

It is an amenable number.

222221110219897 is a deficient number, since it is larger than the sum of its proper divisors (1).

222221110219897 is an equidigital number, since it uses as much as digits as its factorization.

222221110219897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 49.

The spelling of 222221110219897 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, one hundred ten million, two hundred nineteen thousand, eight hundred ninety-seven".