21222230211 has 288 divisors, whose sum is σ = 42915495168. Its totient is φ = 9970974720.

The previous prime is 21222230209. The next prime is 21222230213. The reversal of 21222230211 is 11203222212.

21222230211 is a `hidden beast` number, since 2 + 1 + 222 + 230 + 211 = 666.

It is an interprime number because it is at equal distance from previous prime (21222230209) and next prime (21222230213).

It is not a de Polignac number, because 21222230211 - 2¹ = 21222230209 is a prime.

It is a super-2 number, since 2×21222230211² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21222230213) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 187807291 + ... + 187807403.

It is an arithmetic number, because the mean of its divisors is an integer number (149012136).

Almost surely, 2^21222230211 is an apocalyptic number.

21222230211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21222230211 is an abundant number, since it is smaller than the sum of its proper divisors (21693264957).

21222230211 is a wasteful number, since it uses less digits than its factorization.

21222230211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21222230211 its reverse (11203222212), we get a palindrome (32425452423).

The spelling of 21222230211 in words is "twenty-one billion, two hundred twenty-two million, two hundred thirty thousand, two hundred eleven".