22111000111217 has 2 divisors, whose sum is σ = 22111000111218. Its totient is φ = 22111000111216.

The previous prime is 22111000111177. The next prime is 22111000111231. The reversal of 22111000111217 is 71211100011122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20111601283216 + 1999398828001 = 4484596^2 + 1414001^2 .

It is a cyclic number.

It is not a de Polignac number, because 22111000111217 - 2⁶ = 22111000111153 is a prime.

It is not a weakly prime, because it can be changed into another prime (22111000113217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11055500055608 + 11055500055609.

It is an arithmetic number, because the mean of its divisors is an integer number (11055500055609).

Almost surely, 2^{22111000111217} is an apocalyptic number.

It is an amenable number.

22111000111217 is a deficient number, since it is larger than the sum of its proper divisors (1).

22111000111217 is an equidigital number, since it uses as much as digits as its factorization.

22111000111217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 20.

Adding to 22111000111217 its reverse (71211100011122), we get a palindrome (93322100122339).

The spelling of 22111000111217 in words is "twenty-two trillion, one hundred eleven billion, one hundred eleven thousand, two hundred seventeen".