211213222 has 16 divisors (see below), whose sum is σ = 354052944. Its totient is φ = 93664000.

The previous prime is 211213207. The next prime is 211213229. The reversal of 211213222 is 222312112.

It is a happy number.

It is a super-2 number, since 2×211213222² = 89222050295242568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211213196 and 211213205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211213229) 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, 116179 + ... + 117982.

It is an arithmetic number, because the mean of its divisors is an integer number (22128309).

Almost surely, 2^211213222 is an apocalyptic number.

211213222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

211213222 is a deficient number, since it is larger than the sum of its proper divisors (142839722).

211213222 is a wasteful number, since it uses less digits than its factorization.

211213222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234215.

The product of its digits is 96, while the sum is 16.

The square root of 211213222 is about 14533.1765970142. The cubic root of 211213222 is about 595.5346483130.

Adding to 211213222 its reverse (222312112), we get a palindrome (433525334).

The spelling of 211213222 in words is "two hundred eleven million, two hundred thirteen thousand, two hundred twenty-two".