1321302099 has 32 divisors (see below), whose sum is σ = 1938081600. Its totient is φ = 795801600.

The previous prime is 1321302083. The next prime is 1321302127. The reversal of 1321302099 is 9902031231.

It is a happy number.

It is not a de Polignac number, because 1321302099 - 2⁴ = 1321302083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321302299) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 348687 + ... + 352455.

It is an arithmetic number, because the mean of its divisors is an integer number (60565050).

Almost surely, 2^1321302099 is an apocalyptic number.

1321302099 is a deficient number, since it is larger than the sum of its proper divisors (616779501).

1321302099 is a wasteful number, since it uses less digits than its factorization.

1321302099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3975.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 1321302099 is about 36349.7193799347. The cubic root of 1321302099 is about 1097.3218869567.

The spelling of 1321302099 in words is "one billion, three hundred twenty-one million, three hundred two thousand, ninety-nine".