320121203099 has 4 divisors (see below), whose sum is σ = 320201458080. Its totient is φ = 320040948120.

The previous prime is 320121203053. The next prime is 320121203111. The reversal of 320121203099 is 990302121023.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 320121203099 - 2¹² = 320121199003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320121203009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40121507 + ... + 40129484.

It is an arithmetic number, because the mean of its divisors is an integer number (80050364520).

Almost surely, 2^320121203099 is an apocalyptic number.

320121203099 is a deficient number, since it is larger than the sum of its proper divisors (80254981).

320121203099 is an equidigital number, since it uses as much as digits as its factorization.

320121203099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80254980.

The product of its (nonzero) digits is 5832, while the sum is 32.

The spelling of 320121203099 in words is "three hundred twenty billion, one hundred twenty-one million, two hundred three thousand, ninety-nine".