1121367281 has 2 divisors, whose sum is σ = 1121367282. Its totient is φ = 1121367280.

The previous prime is 1121367241. The next prime is 1121367293. The reversal of 1121367281 is 1827631211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1023040225 + 98327056 = 31985^2 + 9916^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121367281 - 2⁶ = 1121367217 is a prime.

It is a super-2 number, since 2×1121367281² = 2514929157794665922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1121367241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560683640 + 560683641.

It is an arithmetic number, because the mean of its divisors is an integer number (560683641).

Almost surely, 2^1121367281 is an apocalyptic number.

It is an amenable number.

1121367281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121367281 is an equidigital number, since it uses as much as digits as its factorization.

1121367281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 32.

The square root of 1121367281 is about 33486.8224978125. The cubic root of 1121367281 is about 1038.9212436711.

Adding to 1121367281 its reverse (1827631211), we get a palindrome (2948998492).

The spelling of 1121367281 in words is "one billion, one hundred twenty-one million, three hundred sixty-seven thousand, two hundred eighty-one".