21200013222 has 32 divisors (see below), whose sum is σ = 43447916160. Its totient is φ = 6893852160.

The previous prime is 21200013161. The next prime is 21200013223. The reversal of 21200013222 is 22231000212.

It is a happy number.

It is a super-2 number, since 2×21200013222² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200013223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182203 + ... + 274950.

It is an arithmetic number, because the mean of its divisors is an integer number (1357747380).

Almost surely, 2^21200013222 is an apocalyptic number.

21200013222 is an abundant number, since it is smaller than the sum of its proper divisors (22247902938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21200013222 is a wasteful number, since it uses less digits than its factorization.

21200013222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457348.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21200013222 its reverse (22231000212), we get a palindrome (43431013434).

The spelling of 21200013222 in words is "twenty-one billion, two hundred million, thirteen thousand, two hundred twenty-two".