111868307819 has 2 divisors, whose sum is σ = 111868307820. Its totient is φ = 111868307818.

The previous prime is 111868307807. The next prime is 111868307827. The reversal of 111868307819 is 918703868111.

It is a strong prime.

It is an emirp because it is prime and its reverse (918703868111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111868307819 is a prime.

It is a super-2 number, since 2×111868307819² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (111868301819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55934153909 + 55934153910.

It is an arithmetic number, because the mean of its divisors is an integer number (55934153910).

Almost surely, 2^111868307819 is an apocalyptic number.

111868307819 is a deficient number, since it is larger than the sum of its proper divisors (1).

111868307819 is an equidigital number, since it uses as much as digits as its factorization.

111868307819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 580608, while the sum is 53.

The spelling of 111868307819 in words is "one hundred eleven billion, eight hundred sixty-eight million, three hundred seven thousand, eight hundred nineteen".