21221340022 has 16 divisors (see below), whose sum is σ = 32091840000. Its totient is φ = 10524145320.

The previous prime is 21221340017. The next prime is 21221340071. The reversal of 21221340022 is 22004312212.

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, 503479 + ... + 543997.

It is an arithmetic number, because the mean of its divisors is an integer number (2005740000).

Almost surely, 2^21221340022 is an apocalyptic number.

21221340022 is a deficient number, since it is larger than the sum of its proper divisors (10870499978).

21221340022 is a wasteful number, since it uses less digits than its factorization.

21221340022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42651.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21221340022 its reverse (22004312212), we get a palindrome (43225652234).

The spelling of 21221340022 in words is "twenty-one billion, two hundred twenty-one million, three hundred forty thousand, twenty-two".