21043304222 has 16 divisors (see below), whose sum is σ = 31713361920. Its totient is φ = 10472229432.

The previous prime is 21043304221. The next prime is 21043304231. The reversal of 21043304222 is 22240334012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21043304221) 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, 1014083 + ... + 1034625.

It is an arithmetic number, because the mean of its divisors is an integer number (1982085120).

Almost surely, 2^21043304222 is an apocalyptic number.

21043304222 is a deficient number, since it is larger than the sum of its proper divisors (10670057698).

21043304222 is a wasteful number, since it uses less digits than its factorization.

21043304222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22927.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 21043304222 its reverse (22240334012), we get a palindrome (43283638234).

The spelling of 21043304222 in words is "twenty-one billion, forty-three million, three hundred four thousand, two hundred twenty-two".