221021122010202 has 24 divisors (see below), whose sum is σ = 478985966664660. Its totient is φ = 73657265955840.

The previous prime is 221021122010159. The next prime is 221021122010203. The reversal of 221021122010202 is 202010221120122.

It is a happy number.

221021122010202 is a `hidden beast` number, since 2 + 21 + 0 + 211 + 220 + 10 + 202 = 666.

221021122010202 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 216610958208681 + 4410163801521 = 14717709^2 + 2100039^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (221021122010203) 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, 1370032177 + ... + 1370193492.

Almost surely, 2^{221021122010202} is an apocalyptic number.

221021122010202 is an abundant number, since it is smaller than the sum of its proper divisors (257964844654458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221021122010202 is a wasteful number, since it uses less digits than its factorization.

221021122010202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2740230158 (or 2740230155 counting only the distinct ones).

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

Adding to 221021122010202 its reverse (202010221120122), we get a palindrome (423031343130324).

The spelling of 221021122010202 in words is "two hundred twenty-one trillion, twenty-one billion, one hundred twenty-two million, ten thousand, two hundred two".