1121364221 has 2 divisors, whose sum is σ = 1121364222. Its totient is φ = 1121364220.

The previous prime is 1121364137. The next prime is 1121364263. The reversal of 1121364221 is 1224631211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1104232900 + 17131321 = 33230^2 + 4139^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121364221 is a prime.

It is a super-2 number, since 2×1121364221² = 2514915432277873682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121364121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560682110 + 560682111.

It is an arithmetic number, because the mean of its divisors is an integer number (560682111).

Almost surely, 2^1121364221 is an apocalyptic number.

It is an amenable number.

1121364221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121364221 is an equidigital number, since it uses as much as digits as its factorization.

1121364221 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1121364221 is about 33486.7768081671. The cubic root of 1121364221 is about 1038.9202986634.

Adding to 1121364221 its reverse (1224631211), we get a palindrome (2345995432).

The spelling of 1121364221 in words is "one billion, one hundred twenty-one million, three hundred sixty-four thousand, two hundred twenty-one".