11222221120171 has 2 divisors, whose sum is σ = 11222221120172. Its totient is φ = 11222221120170.

The previous prime is 11222221120079. The next prime is 11222221120181. The reversal of 11222221120171 is 17102112222211.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11222221120171 - 2¹⁷ = 11222220989099 is a prime.

It is not a weakly prime, because it can be changed into another prime (11222221120181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5611110560085 + 5611110560086.

It is an arithmetic number, because the mean of its divisors is an integer number (5611110560086).

Almost surely, 2^{11222221120171} is an apocalyptic number.

11222221120171 is a deficient number, since it is larger than the sum of its proper divisors (1).

11222221120171 is an equidigital number, since it uses as much as digits as its factorization.

11222221120171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 25.

Adding to 11222221120171 its reverse (17102112222211), we get a palindrome (28324333342382).

The spelling of 11222221120171 in words is "eleven trillion, two hundred twenty-two billion, two hundred twenty-one million, one hundred twenty thousand, one hundred seventy-one".