21022210222 has 8 divisors (see below), whose sum is σ = 33958955016. Its totient is φ = 9702558552.

The previous prime is 21022210193. The next prime is 21022210241. The reversal of 21022210222 is 22201222012.

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

It is a super-2 number, since 2×21022210222² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21022210196 and 21022210205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 404273248 + ... + 404273299.

It is an arithmetic number, because the mean of its divisors is an integer number (4244869377).

Almost surely, 2^21022210222 is an apocalyptic number.

21022210222 is a deficient number, since it is larger than the sum of its proper divisors (12936744794).

21022210222 is a wasteful number, since it uses less digits than its factorization.

21022210222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808546562.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21022210222 its reverse (22201222012), we get a palindrome (43223432234).

The spelling of 21022210222 in words is "twenty-one billion, twenty-two million, two hundred ten thousand, two hundred twenty-two".