304140120221 has 12 divisors (see below), whose sum is σ = 355840721532. Its totient is φ = 259184636928.

The previous prime is 304140120209. The next prime is 304140120239. The reversal of 304140120221 is 122021041403.

It can be written as a sum of positive squares in 2 ways, for example, as 261106692196 + 43033428025 = 510986^2 + 207445^2 .

It is not a de Polignac number, because 304140120221 - 2³⁴ = 286960251037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 304140120193 and 304140120202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (304140020221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17930660 + ... + 17947613.

It is an arithmetic number, because the mean of its divisors is an integer number (29653393461).

Almost surely, 2^304140120221 is an apocalyptic number.

It is an amenable number.

304140120221 is a deficient number, since it is larger than the sum of its proper divisors (51700601311).

304140120221 is a wasteful number, since it uses less digits than its factorization.

304140120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35878460 (or 35878453 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 304140120221 its reverse (122021041403), we get a palindrome (426161161624).

The spelling of 304140120221 in words is "three hundred four billion, one hundred forty million, one hundred twenty thousand, two hundred twenty-one".