210021022221210 has 24 divisors (see below), whose sum is σ = 546054657775380. Its totient is φ = 56005605925632.

The previous prime is 210021022221191. The next prime is 210021022221211. The reversal of 210021022221210 is 12122220120012.

It is a happy number.

210021022221210 is a `hidden beast` number, since 2 + 1 + 0 + 0 + 210 + 22 + 221 + 210 = 666.

210021022221210 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 209856045715281 + 164976505929 = 14486409^2 + 406173^2 .

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 (210021022221211) 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, 1166783456695 + ... + 1166783456874.

Almost surely, 2^{210021022221210} is an apocalyptic number.

210021022221210 is an abundant number, since it is smaller than the sum of its proper divisors (336033635554170).

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

210021022221210 is a wasteful number, since it uses less digits than its factorization.

210021022221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2333566913582 (or 2333566913579 counting only the distinct ones).

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

Adding to 210021022221210 its reverse (12122220120012), we get a palindrome (222143242341222).

The spelling of 210021022221210 in words is "two hundred ten trillion, twenty-one billion, twenty-two million, two hundred twenty-one thousand, two hundred ten".