111141391 has 2 divisors, whose sum is σ = 111141392. Its totient is φ = 111141390.

The previous prime is 111141379. The next prime is 111141403. The reversal of 111141391 is 193141111.

It is a balanced prime because it is at equal distance from previous prime (111141379) and next prime (111141403).

It is a cyclic number.

It is not a de Polignac number, because 111141391 - 2²⁵ = 77586959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111141091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55570695 + 55570696.

It is an arithmetic number, because the mean of its divisors is an integer number (55570696).

Almost surely, 2^111141391 is an apocalyptic number.

111141391 is a deficient number, since it is larger than the sum of its proper divisors (1).

111141391 is an equidigital number, since it uses as much as digits as its factorization.

111141391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108, while the sum is 22.

The square root of 111141391 is about 10542.3617372959. The cubic root of 111141391 is about 480.7935239594.

The spelling of 111141391 in words is "one hundred eleven million, one hundred forty-one thousand, three hundred ninety-one".