211211222212 has 6 divisors (see below), whose sum is σ = 369619638878. Its totient is φ = 105605611104.

The previous prime is 211211222171. The next prime is 211211222239. The reversal of 211211222212 is 212222112112.

211211222212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 196447514176 + 14763708036 = 443224^2 + 121506^2 .

It is a super-2 number, since 2×211211222212² (a number of 23 digits) contains 22 as substring.

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 211211222212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26401402773 + ... + 26401402780.

Almost surely, 2^211211222212 is an apocalyptic number.

It is an amenable number.

211211222212 is a deficient number, since it is larger than the sum of its proper divisors (158408416666).

211211222212 is a wasteful number, since it uses less digits than its factorization.

211211222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52802805557 (or 52802805555 counting only the distinct ones).

The product of its digits is 128, while the sum is 19.

Adding to 211211222212 its reverse (212222112112), we get a palindrome (423433334324).

The spelling of 211211222212 in words is "two hundred eleven billion, two hundred eleven million, two hundred twenty-two thousand, two hundred twelve".