9920225830321 has 3 divisors (see below), whose sum is σ = 9920228979961. Its totient is φ = 9920222680682.

The previous prime is 9920225830237. The next prime is 9920225830337. The reversal of 9920225830321 is 1230385220299.

The square root of 9920225830321 is 3149639.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 9920225830321 - 2⁹ = 9920225829809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9920225830391) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1574820 + ... + 4724458.

Almost surely, 2^{9920225830321} is an apocalyptic number.

9920225830321 is the 3149639-th square number.

9920225830321 is the 1574820-th centered octagonal number.

It is an amenable number.

9920225830321 is a deficient number, since it is larger than the sum of its proper divisors (3149640).

9920225830321 is an frugal number, since it uses more digits than its factorization.

9920225830321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6299278 (or 3149639 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 46.

The spelling of 9920225830321 in words is "nine trillion, nine hundred twenty billion, two hundred twenty-five million, eight hundred thirty thousand, three hundred twenty-one".