21022102212201 has 12 divisors (see below), whose sum is σ = 30365378913012. Its totient is φ = 14014679348736.

The previous prime is 21022102212179. The next prime is 21022102212229. The reversal of 21022102212201 is 10221220122012.

It is a happy number.

21022102212201 is a `hidden beast` number, since 2 + 1 + 0 + 221 + 0 + 221 + 220 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13928003136576 + 7094099075625 = 3732024^2 + 2663475^2 .

It is not a de Polignac number, because 21022102212201 - 2¹⁰ = 21022102211177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21022102212101) 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, 2151456 + ... + 6831761.

It is an arithmetic number, because the mean of its divisors is an integer number (2530448242751).

Almost surely, 2^{21022102212201} is an apocalyptic number.

It is an amenable number.

21022102212201 is a deficient number, since it is larger than the sum of its proper divisors (9343276700811).

21022102212201 is a wasteful number, since it uses less digits than its factorization.

21022102212201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9243240 (or 9243237 counting only the distinct ones).

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

Adding to 21022102212201 its reverse (10221220122012), we get a palindrome (31243322334213).

The spelling of 21022102212201 in words is "twenty-one trillion, twenty-two billion, one hundred two million, two hundred twelve thousand, two hundred one".