1321222349 has 2 divisors, whose sum is σ = 1321222350. Its totient is φ = 1321222348.

The previous prime is 1321222321. The next prime is 1321222391. The reversal of 1321222349 is 9432221231.

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., 942919849 + 378302500 = 30707^2 + 19450^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321222349 - 2¹² = 1321218253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321222549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660611174 + 660611175.

It is an arithmetic number, because the mean of its divisors is an integer number (660611175).

Almost surely, 2^1321222349 is an apocalyptic number.

It is an amenable number.

1321222349 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321222349 is an equidigital number, since it uses as much as digits as its factorization.

1321222349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 29.

The square root of 1321222349 is about 36348.6223810477. The cubic root of 1321222349 is about 1097.2998094467.

The spelling of 1321222349 in words is "one billion, three hundred twenty-one million, two hundred twenty-two thousand, three hundred forty-nine".