11131120171 has 2 divisors, whose sum is σ = 11131120172. Its totient is φ = 11131120170.

The previous prime is 11131120163. The next prime is 11131120177. The reversal of 11131120171 is 17102113111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11131120171 - 2³ = 11131120163 is a prime.

It is a super-2 number, since 2×11131120171² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11131120177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5565560085 + 5565560086.

It is an arithmetic number, because the mean of its divisors is an integer number (5565560086).

Almost surely, 2^11131120171 is an apocalyptic number.

11131120171 is a deficient number, since it is larger than the sum of its proper divisors (1).

11131120171 is an equidigital number, since it uses as much as digits as its factorization.

11131120171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42, while the sum is 19.

Adding to 11131120171 its reverse (17102113111), we get a palindrome (28233233282).

The spelling of 11131120171 in words is "eleven billion, one hundred thirty-one million, one hundred twenty thousand, one hundred seventy-one".