1101111121999 has 12 divisors (see below), whose sum is σ = 1280927207664. Its totient is φ = 943777965984.

The previous prime is 1101111121987. The next prime is 1101111122087. The reversal of 1101111121999 is 9991211111011.

It is not a de Polignac number, because 1101111121999 - 2¹¹ = 1101111119951 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 (1101111121969) 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 11 ways as a sum of consecutive naturals, for example, 1168254 + ... + 1888660.

It is an arithmetic number, because the mean of its divisors is an integer number (106743933972).

Almost surely, 2^{1101111121999} is an apocalyptic number.

1101111121999 is a deficient number, since it is larger than the sum of its proper divisors (179816085665).

1101111121999 is an equidigital number, since it uses as much as digits as its factorization.

1101111121999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751614 (or 751607 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 37.

The spelling of 1101111121999 in words is "one trillion, one hundred one billion, one hundred eleven million, one hundred twenty-one thousand, nine hundred ninety-nine".