111109999969 has 2 divisors, whose sum is σ = 111109999970. Its totient is φ = 111109999968.

The previous prime is 111109999951. The next prime is 111110000011. The reversal of 111109999969 is 969999901111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62968374225 + 48141625744 = 250935^2 + 219412^2 .

It is a cyclic number.

It is not a de Polignac number, because 111109999969 - 2²⁹ = 110573129057 is a prime.

It is a super-2 number, since 2×111109999969² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111109999969.

It is not a weakly prime, because it can be changed into another prime (111109999919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55554999984 + 55554999985.

It is an arithmetic number, because the mean of its divisors is an integer number (55554999985).

Almost surely, 2^111109999969 is an apocalyptic number.

It is an amenable number.

111109999969 is a deficient number, since it is larger than the sum of its proper divisors (1).

111109999969 is an equidigital number, since it uses as much as digits as its factorization.

111109999969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3188646, while the sum is 64.

The spelling of 111109999969 in words is "one hundred eleven billion, one hundred nine million, nine hundred ninety-nine thousand, nine hundred sixty-nine".