304121311220 has 12 divisors (see below), whose sum is σ = 638654753604. Its totient is φ = 121648524480.

The previous prime is 304121311217. The next prime is 304121311231. The reversal of 304121311220 is 22113121403.

It can be written as a sum of positive squares in 2 ways, for example, as 208043629924 + 96077681296 = 456118^2 + 309964^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 15206065561 = 304121311220 / (3 + 0 + 4 + 1 + 2 + 1 + 3 + 1 + 1 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 304121311192 and 304121311201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7603032761 + ... + 7603032800.

It is an arithmetic number, because the mean of its divisors is an integer number (53221229467).

Almost surely, 2^304121311220 is an apocalyptic number.

It is an amenable number.

304121311220 is an abundant number, since it is smaller than the sum of its proper divisors (334533442384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

304121311220 is a wasteful number, since it uses less digits than its factorization.

304121311220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15206065570 (or 15206065568 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 304121311220 its reverse (22113121403), we get a palindrome (326234432623).

The spelling of 304121311220 in words is "three hundred four billion, one hundred twenty-one million, three hundred eleven thousand, two hundred twenty".