211211222102221 has 12 divisors (see below), whose sum is σ = 232158521548800. Its totient is φ = 192009596526440.

The previous prime is 211211222102201. The next prime is 211211222102273. The reversal of 211211222102221 is 122201222112112.

It is not a de Polignac number, because 211211222102221 - 2⁷ = 211211222102093 is a prime.

It is a super-2 number, since 2×211211222102221² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211211222102192 and 211211222102201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211211222102201) 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, 38305410 + ... + 43470988.

It is an arithmetic number, because the mean of its divisors is an integer number (19346543462400).

Almost surely, 2^{211211222102221} is an apocalyptic number.

It is an amenable number.

211211222102221 is a deficient number, since it is larger than the sum of its proper divisors (20947299446579).

211211222102221 is a wasteful number, since it uses less digits than its factorization.

211211222102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5503520 (or 5503509 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 211211222102221 its reverse (122201222112112), we get a palindrome (333412444214333).

The spelling of 211211222102221 in words is "two hundred eleven trillion, two hundred eleven billion, two hundred twenty-two million, one hundred two thousand, two hundred twenty-one".