211221102211 has 12 divisors (see below), whose sum is σ = 245848059792. Its totient is φ = 180942116208.

The previous prime is 211221102181. The next prime is 211221102221. The reversal of 211221102211 is 112201122112.

It is not a de Polignac number, because 211221102211 - 2¹⁵ = 211221069443 is a prime.

It is a super-2 number, since 2×211221102211² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211221102221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1158775 + ... + 1328608.

It is an arithmetic number, because the mean of its divisors is an integer number (20487338316).

Almost surely, 2^211221102211 is an apocalyptic number.

211221102211 is a deficient number, since it is larger than the sum of its proper divisors (34626957581).

211221102211 is a wasteful number, since it uses less digits than its factorization.

211221102211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2489130 (or 2489123 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 211221102211 its reverse (112201122112), we get a palindrome (323422224323).

The spelling of 211221102211 in words is "two hundred eleven billion, two hundred twenty-one million, one hundred two thousand, two hundred eleven".