1111311243 has 24 divisors (see below), whose sum is σ = 1884131808. Its totient is φ = 617870592.

The previous prime is 1111311211. The next prime is 1111311259. The reversal of 1111311243 is 3421131111.

It is a happy number.

1111311243 is a `hidden beast` number, since 1 + 111 + 311 + 243 = 666.

It is not a de Polignac number, because 1111311243 - 2⁵ = 1111311211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1111311143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 236046 + ... + 240707.

It is an arithmetic number, because the mean of its divisors is an integer number (78505492).

Almost surely, 2^1111311243 is an apocalyptic number.

1111311243 is a deficient number, since it is larger than the sum of its proper divisors (772820565).

1111311243 is a wasteful number, since it uses less digits than its factorization.

1111311243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476803 (or 476800 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

The square root of 1111311243 is about 33336.3351765007. The cubic root of 1111311243 is about 1035.8063505491.

Adding to 1111311243 its reverse (3421131111), we get a palindrome (4532442354).

The spelling of 1111311243 in words is "one billion, one hundred eleven million, three hundred eleven thousand, two hundred forty-three".