1320113111 has 4 divisors (see below), whose sum is σ = 1348200672. Its totient is φ = 1292025552.

The previous prime is 1320113101. The next prime is 1320113143. The reversal of 1320113111 is 1113110231.

It is a happy number.

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 1320113111 - 2¹⁴ = 1320096727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320113101) 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, 14043710 + ... + 14043803.

It is an arithmetic number, because the mean of its divisors is an integer number (337050168).

Almost surely, 2^1320113111 is an apocalyptic number.

1320113111 is a deficient number, since it is larger than the sum of its proper divisors (28087561).

1320113111 is an equidigital number, since it uses as much as digits as its factorization.

1320113111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28087560.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1320113111 is about 36333.3608547296. The cubic root of 1320113111 is about 1096.9926425186.

Adding to 1320113111 its reverse (1113110231), we get a palindrome (2433223342).

The spelling of 1320113111 in words is "one billion, three hundred twenty million, one hundred thirteen thousand, one hundred eleven".