211222211211100 has 36 divisors (see below), whose sum is σ = 458508793496544. Its totient is φ = 84460019015680.

The previous prime is 211222211211071. The next prime is 211222211211113. The reversal of 211222211211100 is 1112112222112.

It is a happy number.

It is a super-2 number, since 2×211222211211100² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 360524197 + ... + 361109596.

It is an arithmetic number, because the mean of its divisors is an integer number (12736355374904).

Almost surely, 2^{211222211211100} is an apocalyptic number.

211222211211100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211222211211100 is an abundant number, since it is smaller than the sum of its proper divisors (247286582285444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211222211211100 is a wasteful number, since it uses less digits than its factorization.

211222211211100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721636734 (or 721636727 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 211222211211100 its reverse (1112112222112), we get a palindrome (212334323433212).

The spelling of 211222211211100 in words is "two hundred eleven trillion, two hundred twenty-two billion, two hundred eleven million, two hundred eleven thousand, one hundred".