1131440111 has 2 divisors, whose sum is σ = 1131440112. Its totient is φ = 1131440110.

The previous prime is 1131440099. The next prime is 1131440129. The reversal of 1131440111 is 1110441311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1131440111 - 2⁶ = 1131440047 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1131440111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131440711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565720055 + 565720056.

It is an arithmetic number, because the mean of its divisors is an integer number (565720056).

Almost surely, 2^1131440111 is an apocalyptic number.

1131440111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131440111 is an equidigital number, since it uses as much as digits as its factorization.

1131440111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 17.

The square root of 1131440111 is about 33636.8861668258. The cubic root of 1131440111 is about 1042.0227248235.

Adding to 1131440111 its reverse (1110441311), we get a palindrome (2241881422).

The spelling of 1131440111 in words is "one billion, one hundred thirty-one million, four hundred forty thousand, one hundred eleven".