321220204125 has 64 divisors (see below), whose sum is σ = 579756393216. Its totient is φ = 157307136000.

The previous prime is 321220204099. The next prime is 321220204183. The reversal of 321220204125 is 521402022123.

It is not a de Polignac number, because 321220204125 - 2⁶ = 321220204061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321220204095 and 321220204104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 353107 + ... + 875856.

It is an arithmetic number, because the mean of its divisors is an integer number (9058693644).

Almost surely, 2^321220204125 is an apocalyptic number.

It is an amenable number.

321220204125 is a deficient number, since it is larger than the sum of its proper divisors (258536189091).

321220204125 is a wasteful number, since it uses less digits than its factorization.

321220204125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1229039 (or 1229029 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 321220204125 its reverse (521402022123), we get a palindrome (842622226248).

The spelling of 321220204125 in words is "three hundred twenty-one billion, two hundred twenty million, two hundred four thousand, one hundred twenty-five".