4131123281 has 2 divisors, whose sum is σ = 4131123282. Its totient is φ = 4131123280.

The previous prime is 4131123239. The next prime is 4131123289. The reversal of 4131123281 is 1823211314.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2482032400 + 1649090881 = 49820^2 + 40609^2 .

It is a cyclic number.

It is not a de Polignac number, because 4131123281 - 2¹⁰ = 4131122257 is a prime.

It is a super-2 number, since 2×4131123281² = 34132359125640409922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4131123281.

It is not a weakly prime, because it can be changed into another prime (4131123289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2065561640 + 2065561641.

It is an arithmetic number, because the mean of its divisors is an integer number (2065561641).

Almost surely, 2^4131123281 is an apocalyptic number.

It is an amenable number.

4131123281 is a deficient number, since it is larger than the sum of its proper divisors (1).

4131123281 is an equidigital number, since it uses as much as digits as its factorization.

4131123281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 26.

The square root of 4131123281 is about 64273.8148937808. The cubic root of 4131123281 is about 1604.5603336295.

Adding to 4131123281 its reverse (1823211314), we get a palindrome (5954334595).

The spelling of 4131123281 in words is "four billion, one hundred thirty-one million, one hundred twenty-three thousand, two hundred eighty-one".