21303121204 has 12 divisors (see below), whose sum is σ = 37309619200. Its totient is φ = 10643230008.

The previous prime is 21303121201. The next prime is 21303121207. The reversal of 21303121204 is 40212130312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21303121201) and next prime (21303121207).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303121201) 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, 2076894 + ... + 2087125.

Almost surely, 2^21303121204 is an apocalyptic number.

It is an amenable number.

21303121204 is a deficient number, since it is larger than the sum of its proper divisors (16006497996).

21303121204 is a wasteful number, since it uses less digits than its factorization.

21303121204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4165302 (or 4165300 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21303121204 its reverse (40212130312), we get a palindrome (61515251516).

The spelling of 21303121204 in words is "twenty-one billion, three hundred three million, one hundred twenty-one thousand, two hundred four".