111131541091 has 2 divisors, whose sum is σ = 111131541092. Its totient is φ = 111131541090.

The previous prime is 111131541071. The next prime is 111131541133. The reversal of 111131541091 is 190145131111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111131541091 - 2⁹ = 111131540579 is a prime.

It is not a weakly prime, because it can be changed into another prime (111131541071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55565770545 + 55565770546.

It is an arithmetic number, because the mean of its divisors is an integer number (55565770546).

Almost surely, 2^111131541091 is an apocalyptic number.

111131541091 is a deficient number, since it is larger than the sum of its proper divisors (1).

111131541091 is an equidigital number, since it uses as much as digits as its factorization.

111131541091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 28.

The spelling of 111131541091 in words is "one hundred eleven billion, one hundred thirty-one million, five hundred forty-one thousand, ninety-one".