111321071 has 2 divisors, whose sum is σ = 111321072. Its totient is φ = 111321070.

The previous prime is 111321059. The next prime is 111321097. The reversal of 111321071 is 170123111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111321071 - 2¹⁰ = 111320047 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111321671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55660535 + 55660536.

It is an arithmetic number, because the mean of its divisors is an integer number (55660536).

Almost surely, 2^111321071 is an apocalyptic number.

111321071 is a deficient number, since it is larger than the sum of its proper divisors (1).

111321071 is an equidigital number, since it uses as much as digits as its factorization.

111321071 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 17.

The square root of 111321071 is about 10550.8801054699. The cubic root of 111321071 is about 481.0524807919.

Adding to 111321071 its reverse (170123111), we get a palindrome (281444182).

The spelling of 111321071 in words is "one hundred eleven million, three hundred twenty-one thousand, seventy-one".