1011131131 has 4 divisors (see below), whose sum is σ = 1011209112. Its totient is φ = 1011053152.

The previous prime is 1011131087. The next prime is 1011131137. The reversal of 1011131131 is 1311311101.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1011131131 - 2¹¹ = 1011129083 is a prime.

It is a super-2 number, since 2×1011131131² = 2044772328154678322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011131137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14350 + ... + 47203.

It is an arithmetic number, because the mean of its divisors is an integer number (252802278).

Almost surely, 2^1011131131 is an apocalyptic number.

1011131131 is a deficient number, since it is larger than the sum of its proper divisors (77981).

1011131131 is an equidigital number, since it uses as much as digits as its factorization.

1011131131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77980.

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

The square root of 1011131131 is about 31798.2881771960. The cubic root of 1011131131 is about 1003.6966946098.

Adding to 1011131131 its reverse (1311311101), we get a palindrome (2322442232).

The spelling of 1011131131 in words is "one billion, eleven million, one hundred thirty-one thousand, one hundred thirty-one".