111131899 has 2 divisors, whose sum is σ = 111131900. Its totient is φ = 111131898.

The previous prime is 111131879. The next prime is 111131927. The reversal of 111131899 is 998131111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111131899 - 2¹⁹ = 110607611 is a prime.

It is not a weakly prime, because it can be changed into another prime (111131809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55565949 + 55565950.

It is an arithmetic number, because the mean of its divisors is an integer number (55565950).

Almost surely, 2^111131899 is an apocalyptic number.

111131899 is a deficient number, since it is larger than the sum of its proper divisors (1).

111131899 is an equidigital number, since it uses as much as digits as its factorization.

111131899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 34.

The square root of 111131899 is about 10541.9115439279. The cubic root of 111131899 is about 480.7798362234.

The spelling of 111131899 in words is "one hundred eleven million, one hundred thirty-one thousand, eight hundred ninety-nine".