321205053399 has 4 divisors (see below), whose sum is σ = 428273404536. Its totient is φ = 214136702264.

The previous prime is 321205053397. The next prime is 321205053437. The reversal of 321205053399 is 993350502123.

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 321205053399 - 2¹ = 321205053397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 321205053399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321205053397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53534175564 + ... + 53534175569.

It is an arithmetic number, because the mean of its divisors is an integer number (107068351134).

Almost surely, 2^321205053399 is an apocalyptic number.

321205053399 is a deficient number, since it is larger than the sum of its proper divisors (107068351137).

321205053399 is a wasteful number, since it uses less digits than its factorization.

321205053399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107068351136.

The product of its (nonzero) digits is 218700, while the sum is 42.

The spelling of 321205053399 in words is "three hundred twenty-one billion, two hundred five million, fifty-three thousand, three hundred ninety-nine".