3201123281 has 2 divisors, whose sum is σ = 3201123282. Its totient is φ = 3201123280.

The previous prime is 3201123223. The next prime is 3201123349. The reversal of 3201123281 is 1823211023.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2893471681 + 307651600 = 53791^2 + 17540^2 .

It is a cyclic number.

It is not a de Polignac number, because 3201123281 - 2¹⁰ = 3201122257 is a prime.

It is a super-2 number, since 2×3201123281² = 20494380520320409922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3201123181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1600561640 + 1600561641.

It is an arithmetic number, because the mean of its divisors is an integer number (1600561641).

Almost surely, 2^3201123281 is an apocalyptic number.

It is an amenable number.

3201123281 is a deficient number, since it is larger than the sum of its proper divisors (1).

3201123281 is an equidigital number, since it uses as much as digits as its factorization.

3201123281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 3201123281 is about 56578.4701189419. The cubic root of 3201123281 is about 1473.7850043926.

The spelling of 3201123281 in words is "three billion, two hundred one million, one hundred twenty-three thousand, two hundred eighty-one".