6731331121 has 2 divisors, whose sum is σ = 6731331122. Its totient is φ = 6731331120.

The previous prime is 6731331109. The next prime is 6731331137. The reversal of 6731331121 is 1211331376.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4564894096 + 2166437025 = 67564^2 + 46545^2 .

It is a cyclic number.

It is not a de Polignac number, because 6731331121 - 2⁹ = 6731330609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6731331121.

It is not a weakly prime, because it can be changed into another prime (6731331161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3365665560 + 3365665561.

It is an arithmetic number, because the mean of its divisors is an integer number (3365665561).

Almost surely, 2^6731331121 is an apocalyptic number.

It is an amenable number.

6731331121 is a deficient number, since it is larger than the sum of its proper divisors (1).

6731331121 is an equidigital number, since it uses as much as digits as its factorization.

6731331121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 28.

The square root of 6731331121 is about 82044.6897794123. The cubic root of 6731331121 is about 1888.1376465624.

Adding to 6731331121 its reverse (1211331376), we get a palindrome (7942662497).

The spelling of 6731331121 in words is "six billion, seven hundred thirty-one million, three hundred thirty-one thousand, one hundred twenty-one".