320122021999 has 4 divisors (see below), whose sum is σ = 344746792936. Its totient is φ = 295497251064.

The previous prime is 320122021993. The next prime is 320122022027. The reversal of 320122021999 is 999120221023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999120221023 = 534043 ⋅1870861.

It is a cyclic number.

It is not a de Polignac number, because 320122021999 - 2¹¹ = 320122019951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320122021993) 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 in 3 ways as a sum of consecutive naturals, for example, 12312385449 + ... + 12312385474.

It is an arithmetic number, because the mean of its divisors is an integer number (86186698234).

Almost surely, 2^320122021999 is an apocalyptic number.

320122021999 is a deficient number, since it is larger than the sum of its proper divisors (24624770937).

320122021999 is a wasteful number, since it uses less digits than its factorization.

320122021999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24624770936.

The product of its (nonzero) digits is 34992, while the sum is 40.

The spelling of 320122021999 in words is "three hundred twenty billion, one hundred twenty-two million, twenty-one thousand, nine hundred ninety-nine".