21022122201210 has 48 divisors (see below), whose sum is σ = 58861942166664. Its totient is φ = 5174676233856.

The previous prime is 21022122201203. The next prime is 21022122201221. The reversal of 21022122201210 is 1210222122012.

It is a happy number.

21022122201210 is a `hidden beast` number, since 2 + 10 + 221 + 2 + 220 + 1 + 210 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 16742573549361 + 4279548651849 = 4091769^2 + 2068707^2 .

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

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, 8983811737 + ... + 8983814076.

Almost surely, 2^{21022122201210} is an apocalyptic number.

21022122201210 is an abundant number, since it is smaller than the sum of its proper divisors (37839819965454).

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

21022122201210 is a wasteful number, since it uses less digits than its factorization.

21022122201210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17967625839 (or 17967625836 counting only the distinct ones).

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

Adding to 21022122201210 its reverse (1210222122012), we get a palindrome (22232344323222).

The spelling of 21022122201210 in words is "twenty-one trillion, twenty-two billion, one hundred twenty-two million, two hundred one thousand, two hundred ten".