211222330 has 16 divisors (see below), whose sum is σ = 414764064. Its totient is φ = 76808080.

The previous prime is 211222309. The next prime is 211222337. The reversal of 211222330 is 33222112.

It is a super-2 number, since 2×211222330² = 89229745381257800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211222337) 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, 959992 + ... + 960211.

It is an arithmetic number, because the mean of its divisors is an integer number (25922754).

Almost surely, 2^211222330 is an apocalyptic number.

211222330 is a deficient number, since it is larger than the sum of its proper divisors (203541734).

211222330 is a wasteful number, since it uses less digits than its factorization.

211222330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1920221.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 211222330 is about 14533.4899456393. The cubic root of 211222330 is about 595.5432084646.

Adding to 211222330 its reverse (33222112), we get a palindrome (244444442).

It can be divided in two parts, 2112 and 22330, that added together give a palindrome (24442).

The spelling of 211222330 in words is "two hundred eleven million, two hundred twenty-two thousand, three hundred thirty".