11124556666891 has 4 divisors (see below), whose sum is σ = 11124576663984. Its totient is φ = 11124536669800.

The previous prime is 11124556666877. The next prime is 11124556666931. The reversal of 11124556666891 is 19866665542111.

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 11124556666891 - 2¹⁷ = 11124556535819 is a prime.

It is a super-2 number, since 2×11124556666891² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11124556666831) 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, 9139480 + ... + 10284901.

It is an arithmetic number, because the mean of its divisors is an integer number (2781144165996).

Almost surely, 2^{11124556666891} is an apocalyptic number.

11124556666891 is a deficient number, since it is larger than the sum of its proper divisors (19997093).

11124556666891 is an equidigital number, since it uses as much as digits as its factorization.

11124556666891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19997092.

The product of its digits is 18662400, while the sum is 61.

The spelling of 11124556666891 in words is "eleven trillion, one hundred twenty-four billion, five hundred fifty-six million, six hundred sixty-six thousand, eight hundred ninety-one".