1011231131 has 4 divisors (see below), whose sum is σ = 1046101200. Its totient is φ = 976361064.

The previous prime is 1011231103. The next prime is 1011231157. The reversal of 1011231131 is 1311321101.

It is a happy number.

1011231131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 1011231131 - 2²² = 1007036827 is a prime.

It is a super-2 number, since 2×1011231131² = 2045176800607078322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011231161) 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, 17434991 + ... + 17435048.

It is an arithmetic number, because the mean of its divisors is an integer number (261525300).

Almost surely, 2^1011231131 is an apocalyptic number.

1011231131 is a deficient number, since it is larger than the sum of its proper divisors (34870069).

1011231131 is an equidigital number, since it uses as much as digits as its factorization.

1011231131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34870068.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1011231131 is about 31799.8605500087. The cubic root of 1011231131 is about 1003.7297817660.

Adding to 1011231131 its reverse (1311321101), we get a palindrome (2322552232).

The spelling of 1011231131 in words is "one billion, eleven million, two hundred thirty-one thousand, one hundred thirty-one".