21201022022 has 8 divisors (see below), whose sum is σ = 31802804496. Its totient is φ = 10600087192.

The previous prime is 21201021991. The next prime is 21201022033. The reversal of 21201022022 is 22022010212.

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

It is a junction number, because it is equal to n+sod(n) for n = 21201021988 and 21201022006.

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, 145178 + ... + 251949.

It is an arithmetic number, because the mean of its divisors is an integer number (3975350562).

Almost surely, 2^21201022022 is an apocalyptic number.

21201022022 is a deficient number, since it is larger than the sum of its proper divisors (10601782474).

21201022022 is a wasteful number, since it uses less digits than its factorization.

21201022022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423822.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21201022022 its reverse (22022010212), we get a palindrome (43223032234).

The spelling of 21201022022 in words is "twenty-one billion, two hundred one million, twenty-two thousand, twenty-two".