111111099965 has 16 divisors (see below), whose sum is σ = 134849448000. Its totient is φ = 87881462400.

The previous prime is 111111099919. The next prime is 111111099971. The reversal of 111111099965 is 569990111111.

It is a happy number.

It is not a de Polignac number, because 111111099965 - 2¹⁸ = 111110837821 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58865 + ... + 475065.

It is an arithmetic number, because the mean of its divisors is an integer number (8428090500).

Almost surely, 2^111111099965 is an apocalyptic number.

It is an amenable number.

111111099965 is a deficient number, since it is larger than the sum of its proper divisors (23738348035).

111111099965 is a wasteful number, since it uses less digits than its factorization.

111111099965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416812.

The product of its (nonzero) digits is 21870, while the sum is 44.

The spelling of 111111099965 in words is "one hundred eleven billion, one hundred eleven million, ninety-nine thousand, nine hundred sixty-five".