1122011999 has 4 divisors (see below), whose sum is σ = 1122096336. Its totient is φ = 1121927664.

The previous prime is 1122011983. The next prime is 1122012007. The reversal of 1122011999 is 9991102211.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9991102211 = 233 ⋅42880267.

It is a cyclic number.

It is not a de Polignac number, because 1122011999 - 2⁴ = 1122011983 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 (1122011399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17339 + ... + 50444.

It is an arithmetic number, because the mean of its divisors is an integer number (280524084).

Almost surely, 2^1122011999 is an apocalyptic number.

1122011999 is a deficient number, since it is larger than the sum of its proper divisors (84337).

1122011999 is an equidigital number, since it uses as much as digits as its factorization.

1122011999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84336.

The product of its (nonzero) digits is 2916, while the sum is 35.

The square root of 1122011999 is about 33496.4475579128. The cubic root of 1122011999 is about 1039.1203110393.

The spelling of 1122011999 in words is "one billion, one hundred twenty-two million, eleven thousand, nine hundred ninety-nine".