2211212222 has 4 divisors (see below), whose sum is σ = 3316818336. Its totient is φ = 1105606110.

The previous prime is 2211212183. The next prime is 2211212279. The reversal of 2211212222 is 2222121122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 2211212222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 552803054 + ... + 552803057.

It is an arithmetic number, because the mean of its divisors is an integer number (829204584).

Almost surely, 2^2211212222 is an apocalyptic number.

2211212222 is a deficient number, since it is larger than the sum of its proper divisors (1105606114).

2211212222 is a wasteful number, since it uses less digits than its factorization.

2211212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105606113.

The product of its digits is 128, while the sum is 17.

The square root of 2211212222 is about 47023.5283873935. The cubic root of 2211212222 is about 1302.7971766755.

Adding to 2211212222 its reverse (2222121122), we get a palindrome (4433333344).

The spelling of 2211212222 in words is "two billion, two hundred eleven million, two hundred twelve thousand, two hundred twenty-two".