111231322987 has 2 divisors, whose sum is σ = 111231322988. Its totient is φ = 111231322986.

The previous prime is 111231322913. The next prime is 111231323023. The reversal of 111231322987 is 789223132111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111231322987 is a prime.

It is not a weakly prime, because it can be changed into another prime (111231320987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55615661493 + 55615661494.

It is an arithmetic number, because the mean of its divisors is an integer number (55615661494).

Almost surely, 2^111231322987 is an apocalyptic number.

111231322987 is a deficient number, since it is larger than the sum of its proper divisors (1).

111231322987 is an equidigital number, since it uses as much as digits as its factorization.

111231322987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 40.

The spelling of 111231322987 in words is "one hundred eleven billion, two hundred thirty-one million, three hundred twenty-two thousand, nine hundred eighty-seven".