1121099999 has 8 divisors (see below), whose sum is σ = 1148539392. Its totient is φ = 1093722840.

The previous prime is 1121099983. The next prime is 1121100083. The reversal of 1121099999 is 9999901211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1121099999 - 2⁴ = 1121099983 is a prime.

It is a Duffinian number.

1121099999 is a modest number, since divided by 99999 gives 11210 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121099099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22004 + ... + 52214.

It is an arithmetic number, because the mean of its divisors is an integer number (143567424).

Almost surely, 2^1121099999 is an apocalyptic number.

1121099999 is a deficient number, since it is larger than the sum of its proper divisors (27439393).

1121099999 is an equidigital number, since it uses as much as digits as its factorization.

1121099999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31117.

The product of its (nonzero) digits is 118098, while the sum is 50.

The square root of 1121099999 is about 33482.8314065582. The cubic root of 1121099999 is about 1038.8386935504.

The spelling of 1121099999 in words is "one billion, one hundred twenty-one million, ninety-nine thousand, nine hundred ninety-nine".