2210210122221 has 12 divisors (see below), whose sum is σ = 3192728495580. Its totient is φ = 1473379831680.

The previous prime is 2210210122189. The next prime is 2210210122231. The reversal of 2210210122221 is 1222210120122.

It is a happy number.

2210210122221 is a `hidden beast` number, since 2 + 210 + 210 + 1 + 22 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1647539109225 + 562671012996 = 1283565^2 + 750114^2 .

It is not a de Polignac number, because 2210210122221 - 2⁵ = 2210210122189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2210210122194 and 2210210122203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2210210122231) 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, 7648866 + ... + 7932563.

It is an arithmetic number, because the mean of its divisors is an integer number (266060707965).

Almost surely, 2^{2210210122221} is an apocalyptic number.

It is an amenable number.

2210210122221 is a deficient number, since it is larger than the sum of its proper divisors (982518373359).

2210210122221 is a wasteful number, since it uses less digits than its factorization.

2210210122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15597196 (or 15597193 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2210210122221 its reverse (1222210120122), we get a palindrome (3432420242343).

The spelling of 2210210122221 in words is "two trillion, two hundred ten billion, two hundred ten million, one hundred twenty-two thousand, two hundred twenty-one".