211321222 has 12 divisors (see below), whose sum is σ = 368734140. Its totient is φ = 90566196.

The previous prime is 211321213. The next prime is 211321223. The reversal of 211321222 is 222123112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 211321196 and 211321205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211321223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1078072 + ... + 1078267.

It is an arithmetic number, because the mean of its divisors is an integer number (30727845).

Almost surely, 2^211321222 is an apocalyptic number.

211321222 is a deficient number, since it is larger than the sum of its proper divisors (157412918).

211321222 is a wasteful number, since it uses less digits than its factorization.

211321222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2156355 (or 2156348 counting only the distinct ones).

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

The square root of 211321222 is about 14536.8917585569. The cubic root of 211321222 is about 595.6361362501.

Adding to 211321222 its reverse (222123112), we get a palindrome (433444334).

The spelling of 211321222 in words is "two hundred eleven million, three hundred twenty-one thousand, two hundred twenty-two".