930120221 has 8 divisors (see below), whose sum is σ = 942190200. Its totient is φ = 918086400.

The previous prime is 930120209. The next prime is 930120227. The reversal of 930120221 is 122021039.

It can be written as a sum of positive squares in 4 ways, for example, as 200364025 + 729756196 = 14155^2 + 27014^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 930120221 - 2¹⁸ = 929858077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 930120193 and 930120202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (930120227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44795 + ... + 62183.

It is an arithmetic number, because the mean of its divisors is an integer number (117773775).

Almost surely, 2^930120221 is an apocalyptic number.

It is an amenable number.

930120221 is a deficient number, since it is larger than the sum of its proper divisors (12069979).

930120221 is a wasteful number, since it uses less digits than its factorization.

930120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18079.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 930120221 is about 30497.8724012020. The cubic root of 930120221 is about 976.1420659706.

The spelling of 930120221 in words is "nine hundred thirty million, one hundred twenty thousand, two hundred twenty-one".