21044204222 has 16 divisors (see below), whose sum is σ = 34134281280. Its totient is φ = 9692448768.

The previous prime is 21044204219. The next prime is 21044204231. The reversal of 21044204222 is 22240244012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6582947 + ... + 6586142.

It is an arithmetic number, because the mean of its divisors is an integer number (2133392580).

Almost surely, 2^21044204222 is an apocalyptic number.

21044204222 is a deficient number, since it is larger than the sum of its proper divisors (13090077058).

21044204222 is a wasteful number, since it uses less digits than its factorization.

21044204222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13169155.

The product of its (nonzero) digits is 2048, while the sum is 23.

Adding to 21044204222 its reverse (22240244012), we get a palindrome (43284448234).

The spelling of 21044204222 in words is "twenty-one billion, forty-four million, two hundred four thousand, two hundred twenty-two".