1111311013 has 4 divisors (see below), whose sum is σ = 1111465260. Its totient is φ = 1111156768.

The previous prime is 1111311011. The next prime is 1111311031. The reversal of 1111311013 is 3101131111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 249418849 + 861892164 = 15793^2 + 29358^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111311013 - 2¹ = 1111311011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111310984 and 1111311002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111311011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65758 + ... + 80911.

It is an arithmetic number, because the mean of its divisors is an integer number (277866315).

Almost surely, 2^1111311013 is an apocalyptic number.

It is an amenable number.

1111311013 is a deficient number, since it is larger than the sum of its proper divisors (154247).

1111311013 is an equidigital number, since it uses as much as digits as its factorization.

1111311013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154246.

The product of its (nonzero) digits is 9, while the sum is 13.

The square root of 1111311013 is about 33336.3317268112. The cubic root of 1111311013 is about 1035.8062790914.

Adding to 1111311013 its reverse (3101131111), we get a palindrome (4212442124).

The spelling of 1111311013 in words is "one billion, one hundred eleven million, three hundred eleven thousand, thirteen".