1222120210221 has 24 divisors (see below), whose sum is σ = 1778283027456. Its totient is φ = 808767771840.

The previous prime is 1222120210151. The next prime is 1222120210229. The reversal of 1222120210221 is 1220120212221.

It is a happy number.

1222120210221 is a `hidden beast` number, since 1 + 22 + 212 + 0 + 210 + 221 = 666.

It is not a de Polignac number, because 1222120210221 - 2¹¹ = 1222120208173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1222120210194 and 1222120210203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222120210229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 112840 + ... + 1567473.

It is an arithmetic number, because the mean of its divisors is an integer number (74095126144).

Almost surely, 2^{1222120210221} is an apocalyptic number.

It is an amenable number.

1222120210221 is a deficient number, since it is larger than the sum of its proper divisors (556162817235).

1222120210221 is a wasteful number, since it uses less digits than its factorization.

1222120210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680913 (or 1680910 counting only the distinct ones).

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

Adding to 1222120210221 its reverse (1220120212221), we get a palindrome (2442240422442).

It can be divided in two parts, 1222120 and 210221, that added together give a palindrome (1432341).

The spelling of 1222120210221 in words is "one trillion, two hundred twenty-two billion, one hundred twenty million, two hundred ten thousand, two hundred twenty-one".