1111111131 has 8 divisors (see below), whose sum is σ = 1595441680. Its totient is φ = 683760672.

The previous prime is 1111111121. The next prime is 1111111139. The reversal of 1111111131 is 1311111111.

1111111131 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1111111131 - 2¹⁰ = 1111110107 is a prime.

It is a super-2 number, since 2×1111111131² = 2469135890864198322, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111111139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14244976 + ... + 14245053.

It is an arithmetic number, because the mean of its divisors is an integer number (199430210).

Almost surely, 2^1111111131 is an apocalyptic number.

1111111131 is a deficient number, since it is larger than the sum of its proper divisors (484330549).

1111111131 is a wasteful number, since it uses less digits than its factorization.

1111111131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28490045.

The product of its digits is 3, while the sum is 12.

The square root of 1111111131 is about 33333.3336316667. Note that the first 3 decimals coincide. The cubic root of 1111111131 is about 1035.7441748312.

Adding to 1111111131 its reverse (1311111111), we get a palindrome (2422222242).

It can be divided in two parts, 1111111 and 131, that multiplied together give a palindrome (145555541).

The spelling of 1111111131 in words is "one billion, one hundred eleven million, one hundred eleven thousand, one hundred thirty-one".