21231120304 has 40 divisors (see below), whose sum is σ = 41363468640. Its totient is φ = 10556794368.

The previous prime is 21231120271. The next prime is 21231120307. The reversal of 21231120304 is 40302113212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21231120307) 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 7 ways as a sum of consecutive naturals, for example, 3422934 + ... + 3429130.

It is an arithmetic number, because the mean of its divisors is an integer number (1034086716).

Almost surely, 2^21231120304 is an apocalyptic number.

It is an amenable number.

21231120304 is a deficient number, since it is larger than the sum of its proper divisors (20132348336).

21231120304 is a wasteful number, since it uses less digits than its factorization.

21231120304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7357 (or 7351 counting only the distinct ones).

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

Adding to 21231120304 its reverse (40302113212), we get a palindrome (61533233516).

The spelling of 21231120304 in words is "twenty-one billion, two hundred thirty-one million, one hundred twenty thousand, three hundred four".