212201020111221 has 48 divisors (see below), whose sum is σ = 316755949498560. Its totient is φ = 136805077785600.

The previous prime is 212201020111183. The next prime is 212201020111229. The reversal of 212201020111221 is 122111020102212.

212201020111221 is a `hidden beast` number, since 2 + 1 + 220 + 10 + 201 + 11 + 221 = 666.

It is not a de Polignac number, because 212201020111221 - 2¹¹ = 212201020109173 is a prime.

It is a super-2 number, since 2×212201020111221² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212201020111194 and 212201020111203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212201020111229) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1703310085 + ... + 1703434661.

It is an arithmetic number, because the mean of its divisors is an integer number (6599082281220).

Almost surely, 2^{212201020111221} is an apocalyptic number.

It is an amenable number.

212201020111221 is a deficient number, since it is larger than the sum of its proper divisors (104554929387339).

212201020111221 is a wasteful number, since it uses less digits than its factorization.

212201020111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168306 (or 168303 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 212201020111221 its reverse (122111020102212), we get a palindrome (334312040213433).

Subtracting from 212201020111221 its reverse (122111020102212), we obtain a palindrome (90090000009009).

The spelling of 212201020111221 in words is "two hundred twelve trillion, two hundred one billion, twenty million, one hundred eleven thousand, two hundred twenty-one".