1320911113 has 4 divisors (see below), whose sum is σ = 1321568020. Its totient is φ = 1320254208.

The previous prime is 1320911089. The next prime is 1320911117. The reversal of 1320911113 is 3111190231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3111190231 = 1787 ⋅1741013.

It can be written as a sum of positive squares in 2 ways, for example, as 1235311609 + 85599504 = 35147^2 + 9252^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1320911113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320911117) 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, 325428 + ... + 329461.

It is an arithmetic number, because the mean of its divisors is an integer number (330392005).

Almost surely, 2^1320911113 is an apocalyptic number.

It is an amenable number.

1320911113 is a deficient number, since it is larger than the sum of its proper divisors (656907).

1320911113 is an equidigital number, since it uses as much as digits as its factorization.

1320911113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656906.

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

The square root of 1320911113 is about 36344.3408662201. The cubic root of 1320911113 is about 1097.2136402453.

The spelling of 1320911113 in words is "one billion, three hundred twenty million, nine hundred eleven thousand, one hundred thirteen".