111045198491 has 2 divisors, whose sum is σ = 111045198492. Its totient is φ = 111045198490.

The previous prime is 111045198437. The next prime is 111045198521. The reversal of 111045198491 is 194891540111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111045198491 - 2⁶ = 111045198427 is a prime.

It is a super-2 number, since 2×111045198491² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111045158491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55522599245 + 55522599246.

It is an arithmetic number, because the mean of its divisors is an integer number (55522599246).

Almost surely, 2^111045198491 is an apocalyptic number.

111045198491 is a deficient number, since it is larger than the sum of its proper divisors (1).

111045198491 is an equidigital number, since it uses as much as digits as its factorization.

111045198491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 44.

The spelling of 111045198491 in words is "one hundred eleven billion, forty-five million, one hundred ninety-eight thousand, four hundred ninety-one".