1321420099 has 2 divisors, whose sum is σ = 1321420100. Its totient is φ = 1321420098.

The previous prime is 1321420097. The next prime is 1321420103. The reversal of 1321420099 is 9900241231.

It is a weak prime.

It is an emirp because it is prime and its reverse (9900241231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1321420099 - 2¹ = 1321420097 is a prime.

Together with 1321420097, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1321420099.

It is not a weakly prime, because it can be changed into another prime (1321420097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660710049 + 660710050.

It is an arithmetic number, because the mean of its divisors is an integer number (660710050).

Almost surely, 2^1321420099 is an apocalyptic number.

1321420099 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321420099 is an equidigital number, since it uses as much as digits as its factorization.

1321420099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 1321420099 is about 36351.3424648939. The cubic root of 1321420099 is about 1097.3545517370.

The spelling of 1321420099 in words is "one billion, three hundred twenty-one million, four hundred twenty thousand, ninety-nine".