1131244111 has 8 divisors (see below), whose sum is σ = 1151427600. Its totient is φ = 1111094400.

The previous prime is 1131244091. The next prime is 1131244171. The reversal of 1131244111 is 1114421311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1131244111 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 (1131244171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64711 + ... + 80311.

It is an arithmetic number, because the mean of its divisors is an integer number (143928450).

Almost surely, 2^1131244111 is an apocalyptic number.

1131244111 is a deficient number, since it is larger than the sum of its proper divisors (20183489).

1131244111 is a wasteful number, since it uses less digits than its factorization.

1131244111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16889.

The product of its digits is 96, while the sum is 19.

The square root of 1131244111 is about 33633.9725723858. The cubic root of 1131244111 is about 1041.9625512899.

Adding to 1131244111 its reverse (1114421311), we get a palindrome (2245665422).

The spelling of 1131244111 in words is "one billion, one hundred thirty-one million, two hundred forty-four thousand, one hundred eleven".