320221135225 has 12 divisors (see below), whose sum is σ = 397728385024. Its totient is φ = 255754858320.

The previous prime is 320221135207. The next prime is 320221135229. The reversal of 320221135225 is 522531122023.

It is not a de Polignac number, because 320221135225 - 2⁷ = 320221135097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320221135193 and 320221135202.

It is not an unprimeable number, because it can be changed into a prime (320221135229) 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 11 ways as a sum of consecutive naturals, for example, 10535769 + ... + 10566118.

Almost surely, 2^320221135225 is an apocalyptic number.

It is an amenable number.

320221135225 is a deficient number, since it is larger than the sum of its proper divisors (77507249799).

320221135225 is a wasteful number, since it uses less digits than its factorization.

320221135225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21102504 (or 21102499 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 320221135225 its reverse (522531122023), we get a palindrome (842752257248).

The spelling of 320221135225 in words is "three hundred twenty billion, two hundred twenty-one million, one hundred thirty-five thousand, two hundred twenty-five".