21210202002222 has 48 divisors (see below), whose sum is σ = 46717796530080. Its totient is φ = 6953708520000.

The previous prime is 21210202002169. The next prime is 21210202002247. The reversal of 21210202002222 is 22220020201212.

21210202002222 is a `hidden beast` number, since 212 + 10 + 20 + 200 + 2 + 222 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 21210202002195 and 21210202002204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38357197 + ... + 38906232.

It is an arithmetic number, because the mean of its divisors is an integer number (973287427710).

Almost surely, 2^{21210202002222} is an apocalyptic number.

21210202002222 is an abundant number, since it is smaller than the sum of its proper divisors (25507594527858).

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

21210202002222 is a wasteful number, since it uses less digits than its factorization.

21210202002222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77263689 (or 77263686 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 21210202002222 its reverse (22220020201212), we get a palindrome (43430222203434).

The spelling of 21210202002222 in words is "twenty-one trillion, two hundred ten billion, two hundred two million, two thousand, two hundred twenty-two".