1321233099 has 32 divisors (see below), whose sum is σ = 1829811456. Its totient is φ = 847566720.

The previous prime is 1321233061. The next prime is 1321233103. The reversal of 1321233099 is 9903321231.

It is not a de Polignac number, because 1321233099 - 2⁷ = 1321232971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321233019) 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, 2415144 + ... + 2415690.

It is an arithmetic number, because the mean of its divisors is an integer number (57181608).

Almost surely, 2^1321233099 is an apocalyptic number.

1321233099 is a deficient number, since it is larger than the sum of its proper divisors (508578357).

1321233099 is a wasteful number, since it uses less digits than its factorization.

1321233099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875.

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 1321233099 is about 36348.7702543016. The cubic root of 1321233099 is about 1097.3027854638.

The spelling of 1321233099 in words is "one billion, three hundred twenty-one million, two hundred thirty-three thousand, ninety-nine".