21303212222 has 16 divisors (see below), whose sum is σ = 32739487200. Its totient is φ = 10390133760.

The previous prime is 21303212221. The next prime is 21303212257. The reversal of 21303212222 is 22221230312.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21303212194 and 21303212203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303212221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 602654 + ... + 637022.

It is an arithmetic number, because the mean of its divisors is an integer number (2046217950).

Almost surely, 2^21303212222 is an apocalyptic number.

21303212222 is a deficient number, since it is larger than the sum of its proper divisors (11436274978).

21303212222 is a wasteful number, since it uses less digits than its factorization.

21303212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41971.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21303212222 its reverse (22221230312), we get a palindrome (43524442534).

The spelling of 21303212222 in words is "twenty-one billion, three hundred three million, two hundred twelve thousand, two hundred twenty-two".