111199999949 has 4 divisors (see below), whose sum is σ = 111201390300. Its totient is φ = 111198609600.

The previous prime is 111199999919. The next prime is 111199999987. The reversal of 111199999949 is 949999991111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 949999991111 = 1373 ⋅691915507.

It can be written as a sum of positive squares in 2 ways, for example, as 81935055049 + 29264944900 = 286243^2 + 171070^2 .

It is a cyclic number.

It is not a de Polignac number, because 111199999949 - 2⁸ = 111199999693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111199999909) 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 in 3 ways as a sum of consecutive naturals, for example, 567374 + ... + 737775.

It is an arithmetic number, because the mean of its divisors is an integer number (27800347575).

Almost surely, 2^111199999949 is an apocalyptic number.

It is an amenable number.

111199999949 is a deficient number, since it is larger than the sum of its proper divisors (1390351).

111199999949 is an equidigital number, since it uses as much as digits as its factorization.

111199999949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390350.

The product of its digits is 19131876, while the sum is 71.

The spelling of 111199999949 in words is "one hundred eleven billion, one hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred forty-nine".