2121245304 has 16 divisors (see below), whose sum is σ = 5303113320. Its totient is φ = 707081760.

The previous prime is 2121245303. The next prime is 2121245323. The reversal of 2121245304 is 4035421212.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 88385221 = 2121245304 / (2 + 1 + 2 + 1 + 2 + 4 + 5 + 3 + 0 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121245303) 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 3 ways as a sum of consecutive naturals, for example, 44192587 + ... + 44192634.

Almost surely, 2^2121245304 is an apocalyptic number.

2121245304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2121245304 is an abundant number, since it is smaller than the sum of its proper divisors (3181868016).

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

2121245304 is a wasteful number, since it uses less digits than its factorization.

2121245304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88385230 (or 88385226 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 2121245304 is about 46056.9788848552. The cubic root of 2121245304 is about 1284.8831425879.

Adding to 2121245304 its reverse (4035421212), we get a palindrome (6156666516).

The spelling of 2121245304 in words is "two billion, one hundred twenty-one million, two hundred forty-five thousand, three hundred four".