1031113081 has 2 divisors, whose sum is σ = 1031113082. Its totient is φ = 1031113080.

The previous prime is 1031113079. The next prime is 1031113133. The reversal of 1031113081 is 1803111301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1020163600 + 10949481 = 31940^2 + 3309^2 .

It is a cyclic number.

It is not a de Polignac number, because 1031113081 - 2¹ = 1031113079 is a prime.

It is a super-2 number, since 2×1031113081² = 2126388371618625122, which contains 22 as substring.

Together with 1031113079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1031113021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515556540 + 515556541.

It is an arithmetic number, because the mean of its divisors is an integer number (515556541).

Almost surely, 2^1031113081 is an apocalyptic number.

It is an amenable number.

1031113081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031113081 is an equidigital number, since it uses as much as digits as its factorization.

1031113081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 1031113081 is about 32110.9495499588. The cubic root of 1031113081 is about 1010.2652902438.

Adding to 1031113081 its reverse (1803111301), we get a palindrome (2834224382).

The spelling of 1031113081 in words is "one billion, thirty-one million, one hundred thirteen thousand, eighty-one".