321272201205 has 64 divisors (see below), whose sum is σ = 587282545920. Its totient is φ = 166516570368.

The previous prime is 321272201191. The next prime is 321272201233. The reversal of 321272201205 is 502102272123.

It is not a de Polignac number, because 321272201205 - 2⁴ = 321272201189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4223034 + ... + 4298436.

It is an arithmetic number, because the mean of its divisors is an integer number (9176289780).

Almost surely, 2^321272201205 is an apocalyptic number.

It is an amenable number.

321272201205 is a deficient number, since it is larger than the sum of its proper divisors (266010344715).

321272201205 is a wasteful number, since it uses less digits than its factorization.

321272201205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76307 (or 76301 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

Adding to 321272201205 its reverse (502102272123), we get a palindrome (823374473328).

The spelling of 321272201205 in words is "three hundred twenty-one billion, two hundred seventy-two million, two hundred one thousand, two hundred five".