1122312281 has 2 divisors, whose sum is σ = 1122312282. Its totient is φ = 1122312280.

The previous prime is 1122312277. The next prime is 1122312299. The reversal of 1122312281 is 1822132211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1066675600 + 55636681 = 32660^2 + 7459^2 .

It is a cyclic number.

It is not a de Polignac number, because 1122312281 - 2² = 1122312277 is a prime.

It is a super-2 number, since 2×1122312281² = 2519169712166845922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1122315281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561156140 + 561156141.

It is an arithmetic number, because the mean of its divisors is an integer number (561156141).

Almost surely, 2^1122312281 is an apocalyptic number.

It is an amenable number.

1122312281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1122312281 is an equidigital number, since it uses as much as digits as its factorization.

1122312281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384, while the sum is 23.

The square root of 1122312281 is about 33500.9295542676. The cubic root of 1122312281 is about 1039.2130020544.

Adding to 1122312281 its reverse (1822132211), we get a palindrome (2944444492).

The spelling of 1122312281 in words is "one billion, one hundred twenty-two million, three hundred twelve thousand, two hundred eighty-one".