1111344667891 has 4 divisors (see below), whose sum is σ = 1114702204984. Its totient is φ = 1107987130800.

The previous prime is 1111344667889. The next prime is 1111344667921. The reversal of 1111344667891 is 1987664431111.

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 1111344667891 - 2¹ = 1111344667889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111344667831) 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, 1678768050 + ... + 1678768711.

It is an arithmetic number, because the mean of its divisors is an integer number (278675551246).

Almost surely, 2^{1111344667891} is an apocalyptic number.

1111344667891 is a deficient number, since it is larger than the sum of its proper divisors (3357537093).

1111344667891 is an equidigital number, since it uses as much as digits as its factorization.

1111344667891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3357537092.

The product of its digits is 870912, while the sum is 52.

The spelling of 1111344667891 in words is "one trillion, one hundred eleven billion, three hundred forty-four million, six hundred sixty-seven thousand, eight hundred ninety-one".