1331031113 has 2 divisors, whose sum is σ = 1331031114. Its totient is φ = 1331031112.

The previous prime is 1331031109. The next prime is 1331031131. The reversal of 1331031113 is 3111301331.

Together with next prime (1331031131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 781034809 + 549996304 = 27947^2 + 23452^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331031113 - 2² = 1331031109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1331031091 and 1331031100.

It is not a weakly prime, because it can be changed into another prime (1331031193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665515556 + 665515557.

It is an arithmetic number, because the mean of its divisors is an integer number (665515557).

Almost surely, 2^1331031113 is an apocalyptic number.

It is an amenable number.

1331031113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331031113 is an equidigital number, since it uses as much as digits as its factorization.

1331031113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81, while the sum is 17.

The square root of 1331031113 is about 36483.2990969841. The cubic root of 1331031113 is about 1100.0085710076.

Adding to 1331031113 its reverse (3111301331), we get a palindrome (4442332444).

The spelling of 1331031113 in words is "one billion, three hundred thirty-one million, thirty-one thousand, one hundred thirteen".