1121999999999 has 4 divisors (see below), whose sum is σ = 1122354281664. Its totient is φ = 1121645718336.

The previous prime is 1121999999941. The next prime is 1122000000041. The reversal of 1121999999999 is 9999999991211.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1121999999999 - 2⁴⁰ = 22488372223 is a prime.

It is a Duffinian number.

1121999999999 is a modest number, since divided by 9999999 gives 112199 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 1121999999999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121999969999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177136082 + ... + 177142415.

It is an arithmetic number, because the mean of its divisors is an integer number (280588570416).

Almost surely, 2^{1121999999999} is an apocalyptic number.

1121999999999 is a deficient number, since it is larger than the sum of its proper divisors (354281665).

1121999999999 is an equidigital number, since it uses as much as digits as its factorization.

1121999999999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354281664.

The product of its digits is 774840978, while the sum is 86.

The spelling of 1121999999999 in words is "one trillion, one hundred twenty-one billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".