1121793978679 has 4 divisors (see below), whose sum is σ = 1223775249480. Its totient is φ = 1019812707880.

The previous prime is 1121793978673. The next prime is 1121793978713. The reversal of 1121793978679 is 9768793971211.

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 1121793978679 - 2¹⁹ = 1121793454391 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 (1121793978673) 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, 50990635384 + ... + 50990635405.

It is an arithmetic number, because the mean of its divisors is an integer number (305943812370).

Almost surely, 2^{1121793978679} is an apocalyptic number.

1121793978679 is a deficient number, since it is larger than the sum of its proper divisors (101981270801).

1121793978679 is a wasteful number, since it uses less digits than its factorization.

1121793978679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101981270800.

The product of its digits is 72013536, while the sum is 70.

The spelling of 1121793978679 in words is "one trillion, one hundred twenty-one billion, seven hundred ninety-three million, nine hundred seventy-eight thousand, six hundred seventy-nine".