1111223556679 has 4 divisors (see below), whose sum is σ = 1113505330384. Its totient is φ = 1108941782976.

The previous prime is 1111223556671. The next prime is 1111223556697. The reversal of 1111223556679 is 9766553221111.

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 1111223556679 - 2³ = 1111223556671 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111223556671) 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 3 ways as a sum of consecutive naturals, for example, 1140886122 + ... + 1140887095.

It is an arithmetic number, because the mean of its divisors is an integer number (278376332596).

Almost surely, 2^{1111223556679} is an apocalyptic number.

1111223556679 is a deficient number, since it is larger than the sum of its proper divisors (2281773705).

1111223556679 is an equidigital number, since it uses as much as digits as its factorization.

1111223556679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2281773704.

The product of its digits is 680400, while the sum is 49.

The spelling of 1111223556679 in words is "one trillion, one hundred eleven billion, two hundred twenty-three million, five hundred fifty-six thousand, six hundred seventy-nine".