1320111343 has 2 divisors, whose sum is σ = 1320111344. Its totient is φ = 1320111342.

The previous prime is 1320111337. The next prime is 1320111361. The reversal of 1320111343 is 3431110231.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1320111343 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1320111343.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320111383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660055671 + 660055672.

It is an arithmetic number, because the mean of its divisors is an integer number (660055672).

Almost surely, 2^1320111343 is an apocalyptic number.

1320111343 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320111343 is an equidigital number, since it uses as much as digits as its factorization.

1320111343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1320111343 is about 36333.3365244647. The cubic root of 1320111343 is about 1096.9921527919.

Adding to 1320111343 its reverse (3431110231), we get a palindrome (4751221574).

The spelling of 1320111343 in words is "one billion, three hundred twenty million, one hundred eleven thousand, three hundred forty-three".