211222211222210 has 16 divisors (see below), whose sum is σ = 380200199902776. Its totient is φ = 84488835666048.

The previous prime is 211222211222189. The next prime is 211222211222221. The reversal of 211222211222210 is 12222112222112.

It can be written as a sum of positive squares in 4 ways, for example, as 52963068770329 + 158259142451881 = 7277573^2 + 12580109^2 .

It is a super-2 number, since 2×211222211222210² (a number of 29 digits) contains 22 as substring.

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 in 7 ways as a sum of consecutive naturals, for example, 15816494 + ... + 25934646.

Almost surely, 2^{211222211222210} is an apocalyptic number.

211222211222210 is a deficient number, since it is larger than the sum of its proper divisors (168977988680566).

211222211222210 is a wasteful number, since it uses less digits than its factorization.

211222211222210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12205717.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 211222211222210 its reverse (12222112222112), we get a palindrome (223444323444322).

The spelling of 211222211222210 in words is "two hundred eleven trillion, two hundred twenty-two billion, two hundred eleven million, two hundred twenty-two thousand, two hundred ten".