1121193772478 has 16 divisors (see below), whose sum is σ = 1811188934016. Its totient is φ = 517465545120.

The previous prime is 1121193772453. The next prime is 1121193772487. The reversal of 1121193772478 is 8742773911211.

It is a happy number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 1427300 + ... + 2068712.

It is an arithmetic number, because the mean of its divisors is an integer number (113199308376).

Almost surely, 2^{1121193772478} is an apocalyptic number.

1121193772478 is a deficient number, since it is larger than the sum of its proper divisors (689995161538).

1121193772478 is a wasteful number, since it uses less digits than its factorization.

1121193772478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708659.

The product of its digits is 1185408, while the sum is 53.

The spelling of 1121193772478 in words is "one trillion, one hundred twenty-one billion, one hundred ninety-three million, seven hundred seventy-two thousand, four hundred seventy-eight".