211100001222 has 64 divisors (see below), whose sum is σ = 475959939840. Its totient is φ = 61863312000.

The previous prime is 211100001209. The next prime is 211100001253. The reversal of 211100001222 is 222100001112.

It is a junction number, because it is equal to n+sod(n) for n = 211100001198 and 211100001207.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81597 + ... + 654872.

It is an arithmetic number, because the mean of its divisors is an integer number (7436874060).

Almost surely, 2^211100001222 is an apocalyptic number.

211100001222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

211100001222 is an abundant number, since it is smaller than the sum of its proper divisors (264859938618).

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

211100001222 is a wasteful number, since it uses less digits than its factorization.

211100001222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736629.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 211100001222 its reverse (222100001112), we get a palindrome (433200002334).

The spelling of 211100001222 in words is "two hundred eleven billion, one hundred million, one thousand, two hundred twenty-two".