21200221222 has 16 divisors (see below), whose sum is σ = 32414815872. Its totient is φ = 10395461440.

The previous prime is 21200221213. The next prime is 21200221253. The reversal of 21200221222 is 22212200212.

It is a junction number, because it is equal to n+sod(n) for n = 21200221196 and 21200221205.

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, 199947 + ... + 287017.

It is an arithmetic number, because the mean of its divisors is an integer number (2025925992).

Almost surely, 2^21200221222 is an apocalyptic number.

21200221222 is a deficient number, since it is larger than the sum of its proper divisors (11214594650).

21200221222 is a wasteful number, since it uses less digits than its factorization.

21200221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89423.

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

Adding to 21200221222 its reverse (22212200212), we get a palindrome (43412421434).

The spelling of 21200221222 in words is "twenty-one billion, two hundred million, two hundred twenty-one thousand, two hundred twenty-two".