21201320222 has 8 divisors (see below), whose sum is σ = 31810194696. Its totient is φ = 10597921992.

The previous prime is 21201320207. The next prime is 21201320233. The reversal of 21201320222 is 22202310212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21201320222² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21201320222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1359368 + ... + 1374875.

It is an arithmetic number, because the mean of its divisors is an integer number (3976274337).

Almost surely, 2^21201320222 is an apocalyptic number.

21201320222 is a deficient number, since it is larger than the sum of its proper divisors (10608874474).

21201320222 is a wasteful number, since it uses less digits than its factorization.

21201320222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2738122.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21201320222 its reverse (22202310212), we get a palindrome (43403630434).

The spelling of 21201320222 in words is "twenty-one billion, two hundred one million, three hundred twenty thousand, two hundred twenty-two".