22210110211221 has 12 divisors (see below), whose sum is σ = 32162079555372. Its totient is φ = 14769443563776.

The previous prime is 22210110211213. The next prime is 22210110211249. The reversal of 22210110211221 is 12211201101222.

22210110211221 is a `hidden beast` number, since 2 + 221 + 0 + 1 + 10 + 211 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 14466718748196 + 7743391463025 = 3803514^2 + 2782695^2 .

It is not a de Polignac number, because 22210110211221 - 2³ = 22210110211213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22210110211194 and 22210110211203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22210110211291) 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, 3108044316 + ... + 3108051461.

It is an arithmetic number, because the mean of its divisors is an integer number (2680173296281).

Almost surely, 2^{22210110211221} is an apocalyptic number.

It is an amenable number.

22210110211221 is a deficient number, since it is larger than the sum of its proper divisors (9951969344151).

22210110211221 is a wasteful number, since it uses less digits than its factorization.

22210110211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6216096180 (or 6216096177 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 22210110211221 its reverse (12211201101222), we get a palindrome (34421311312443).

The spelling of 22210110211221 in words is "twenty-two trillion, two hundred ten billion, one hundred ten million, two hundred eleven thousand, two hundred twenty-one".