1121666430555 has 96 divisors (see below), whose sum is σ = 2126093598720. Its totient is φ = 542526336000.

The previous prime is 1121666430527. The next prime is 1121666430601. The reversal of 1121666430555 is 5550346661211.

It is not a de Polignac number, because 1121666430555 - 2⁷ = 1121666430427 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1121666430555.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 557764500 + ... + 557766510.

It is an arithmetic number, because the mean of its divisors is an integer number (22146808320).

Almost surely, 2^{1121666430555} is an apocalyptic number.

1121666430555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1121666430555 is a deficient number, since it is larger than the sum of its proper divisors (1004427168165).

1121666430555 is a wasteful number, since it uses less digits than its factorization.

1121666430555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4193 (or 4190 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 45.

The spelling of 1121666430555 in words is "one trillion, one hundred twenty-one billion, six hundred sixty-six million, four hundred thirty thousand, five hundred fifty-five".