1131012031 has 4 divisors (see below), whose sum is σ = 1190539000. Its totient is φ = 1071485064.

The previous prime is 1131012017. The next prime is 1131012053. The reversal of 1131012031 is 1302101311.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1131012031 is a prime.

It is a super-2 number, since 2×1131012031² = 2558376428533489922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131012011) 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, 29763456 + ... + 29763493.

It is an arithmetic number, because the mean of its divisors is an integer number (297634750).

Almost surely, 2^1131012031 is an apocalyptic number.

1131012031 is a deficient number, since it is larger than the sum of its proper divisors (59526969).

1131012031 is an equidigital number, since it uses as much as digits as its factorization.

1131012031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59526968.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1131012031 is about 33630.5223123281. The cubic root of 1131012031 is about 1041.8912919259.

Adding to 1131012031 its reverse (1302101311), we get a palindrome (2433113342).

The spelling of 1131012031 in words is "one billion, one hundred thirty-one million, twelve thousand, thirty-one".