111345122491 has 2 divisors, whose sum is σ = 111345122492. Its totient is φ = 111345122490.

The previous prime is 111345122489. The next prime is 111345122503. The reversal of 111345122491 is 194221543111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111345122491 - 2¹ = 111345122489 is a prime.

Together with 111345122489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (111345122591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55672561245 + 55672561246.

It is an arithmetic number, because the mean of its divisors is an integer number (55672561246).

Almost surely, 2^111345122491 is an apocalyptic number.

111345122491 is a deficient number, since it is larger than the sum of its proper divisors (1).

111345122491 is an equidigital number, since it uses as much as digits as its factorization.

111345122491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 34.

The spelling of 111345122491 in words is "one hundred eleven billion, three hundred forty-five million, one hundred twenty-two thousand, four hundred ninety-one".