1111199999 has 48 divisors (see below), whose sum is σ = 1440383616. Its totient is φ = 849139200.

The previous prime is 1111199987. The next prime is 1111200001. The reversal of 1111199999 is 9999911111.

It is a de Polignac number, because none of the positive numbers 2^k-1111199999 is a prime.

1111199999 is a modest number, since divided by 99999 gives 11111 as remainder.

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111199909) by changing a digit.

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

It is an upside-down number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4100234 + ... + 4100504.

It is an arithmetic number, because the mean of its divisors is an integer number (30007992).

Almost surely, 2^1111199999 is an apocalyptic number.

1111199999 is a deficient number, since it is larger than the sum of its proper divisors (329183617).

1111199999 is a wasteful number, since it uses less digits than its factorization.

1111199999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496 (or 489 counting only the distinct ones).

The product of its digits is 59049, while the sum is 50.

The square root of 1111199999 is about 33334.6666250017. Note that the first 4 decimals coincide. The cubic root of 1111199999 is about 1035.7717874486.

It can be divided in two parts, 11111 and 99999, that multiplied together give a square (1111088889 = 33333²).

The spelling of 1111199999 in words is "one billion, one hundred eleven million, one hundred ninety-nine thousand, nine hundred ninety-nine".