1120311391 has 4 divisors (see below), whose sum is σ = 1120389400. Its totient is φ = 1120233384.

The previous prime is 1120311359. The next prime is 1120311433. The reversal of 1120311391 is 1931130211.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1931130211 = 103 ⋅18748837.

It is a cyclic number.

It is not a de Polignac number, because 1120311391 - 2⁵ = 1120311359 is a prime.

It is a super-2 number, since 2×1120311391² = 2510195225608709762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1120311091) 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, 10536 + ... + 48493.

It is an arithmetic number, because the mean of its divisors is an integer number (280097350).

Almost surely, 2^1120311391 is an apocalyptic number.

1120311391 is a deficient number, since it is larger than the sum of its proper divisors (78009).

1120311391 is an equidigital number, since it uses as much as digits as its factorization.

1120311391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78008.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 1120311391 is about 33471.0530309400. The cubic root of 1120311391 is about 1038.5950552575.

The spelling of 1120311391 in words is "one billion, one hundred twenty million, three hundred eleven thousand, three hundred ninety-one".