26122211222197 has 2 divisors, whose sum is σ = 26122211222198. Its totient is φ = 26122211222196.

The previous prime is 26122211222143. The next prime is 26122211222201. The reversal of 26122211222197 is 79122211222162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13917033146916 + 12205178075281 = 3730554^2 + 3493591^2 .

It is a cyclic number.

It is not a de Polignac number, because 26122211222197 - 2²³ = 26122202833589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26122211222137) 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, 13061105611098 + 13061105611099.

It is an arithmetic number, because the mean of its divisors is an integer number (13061105611099).

Almost surely, 2^{26122211222197} is an apocalyptic number.

It is an amenable number.

26122211222197 is a deficient number, since it is larger than the sum of its proper divisors (1).

26122211222197 is an equidigital number, since it uses as much as digits as its factorization.

26122211222197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 40.

The spelling of 26122211222197 in words is "twenty-six trillion, one hundred twenty-two billion, two hundred eleven million, two hundred twenty-two thousand, one hundred ninety-seven".