111111005815699 has 2 divisors, whose sum is σ = 111111005815700. Its totient is φ = 111111005815698.

The previous prime is 111111005815669. The next prime is 111111005815781. The reversal of 111111005815699 is 996518500111111.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111111005815699 - 2¹³ = 111111005807507 is a prime.

It is a super-2 number, since 2×111111005815699² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111111005815669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555502907849 + 55555502907850.

It is an arithmetic number, because the mean of its divisors is an integer number (55555502907850).

Almost surely, 2^{111111005815699} is an apocalyptic number.

111111005815699 is a deficient number, since it is larger than the sum of its proper divisors (1).

111111005815699 is an equidigital number, since it uses as much as digits as its factorization.

111111005815699 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97200, while the sum is 49.

The spelling of 111111005815699 in words is "one hundred eleven trillion, one hundred eleven billion, five million, eight hundred fifteen thousand, six hundred ninety-nine".