111120121171 has 2 divisors, whose sum is σ = 111120121172. Its totient is φ = 111120121170.

The previous prime is 111120121093. The next prime is 111120121199. The reversal of 111120121171 is 171121021111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111120121171 - 2⁹ = 111120120659 is a prime.

It is a super-2 number, since 2×111120121171² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111120121571) 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, 55560060585 + 55560060586.

It is an arithmetic number, because the mean of its divisors is an integer number (55560060586).

Almost surely, 2^111120121171 is an apocalyptic number.

111120121171 is a deficient number, since it is larger than the sum of its proper divisors (1).

111120121171 is an equidigital number, since it uses as much as digits as its factorization.

111120121171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28, while the sum is 19.

Adding to 111120121171 its reverse (171121021111), we get a palindrome (282241142282).

The spelling of 111120121171 in words is "one hundred eleven billion, one hundred twenty million, one hundred twenty-one thousand, one hundred seventy-one".