2121211222 has 16 divisors (see below), whose sum is σ = 3429970992. Its totient is φ = 978049440.

The previous prime is 2121211207. The next prime is 2121211237. The reversal of 2121211222 is 2221121212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2121211207) and next prime (2121211237).

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

It is a junction number, because it is equal to n+sod(n) for n = 2121211196 and 2121211205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13408 + ... + 66499.

It is an arithmetic number, because the mean of its divisors is an integer number (214373187).

Almost surely, 2^2121211222 is an apocalyptic number.

2121211222 is a deficient number, since it is larger than the sum of its proper divisors (1308759770).

2121211222 is a wasteful number, since it uses less digits than its factorization.

2121211222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80943.

The product of its digits is 64, while the sum is 16.

The square root of 2121211222 is about 46056.6088851535. The cubic root of 2121211222 is about 1284.8762611550.

Adding to 2121211222 its reverse (2221121212), we get a palindrome (4342332434).

The spelling of 2121211222 in words is "two billion, one hundred twenty-one million, two hundred eleven thousand, two hundred twenty-two".