9122129281 has 2 divisors, whose sum is σ = 9122129282. Its totient is φ = 9122129280.

The previous prime is 9122129267. The next prime is 9122129287. The reversal of 9122129281 is 1829212219.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4580582400 + 4541546881 = 67680^2 + 67391^2 .

It is an emirp because it is prime and its reverse (1829212219) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9122129281 - 2²⁵ = 9088574849 is a prime.

It is a super-2 number, since 2×9122129281² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9122129281.

It is not a weakly prime, because it can be changed into another prime (9122129287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4561064640 + 4561064641.

It is an arithmetic number, because the mean of its divisors is an integer number (4561064641).

Almost surely, 2^9122129281 is an apocalyptic number.

It is an amenable number.

9122129281 is a deficient number, since it is larger than the sum of its proper divisors (1).

9122129281 is an equidigital number, since it uses as much as digits as its factorization.

9122129281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 37.

The square root of 9122129281 is about 95509.8386607369. The cubic root of 9122129281 is about 2089.4504389794.

The spelling of 9122129281 in words is "nine billion, one hundred twenty-two million, one hundred twenty-nine thousand, two hundred eighty-one".