111310321987 has 2 divisors, whose sum is σ = 111310321988. Its totient is φ = 111310321986.

The previous prime is 111310321979. The next prime is 111310322029. The reversal of 111310321987 is 789123013111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111310321987 - 2³ = 111310321979 is a prime.

It is not a weakly prime, because it can be changed into another prime (111310321687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55655160993 + 55655160994.

It is an arithmetic number, because the mean of its divisors is an integer number (55655160994).

Almost surely, 2^111310321987 is an apocalyptic number.

111310321987 is a deficient number, since it is larger than the sum of its proper divisors (1).

111310321987 is an equidigital number, since it uses as much as digits as its factorization.

111310321987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 37.

The spelling of 111310321987 in words is "one hundred eleven billion, three hundred ten million, three hundred twenty-one thousand, nine hundred eighty-seven".