1321442099 has 2 divisors, whose sum is σ = 1321442100. Its totient is φ = 1321442098.

The previous prime is 1321442071. The next prime is 1321442117. The reversal of 1321442099 is 9902441231.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321442099 is a prime.

It is not a weakly prime, because it can be changed into another prime (1321442009) 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, 660721049 + 660721050.

It is an arithmetic number, because the mean of its divisors is an integer number (660721050).

Almost surely, 2^1321442099 is an apocalyptic number.

1321442099 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321442099 is an equidigital number, since it uses as much as digits as its factorization.

1321442099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 1321442099 is about 36351.6450659389. The cubic root of 1321442099 is about 1097.3606415657.

The spelling of 1321442099 in words is "one billion, three hundred twenty-one million, four hundred forty-two thousand, ninety-nine".