11212102201221 has 6 divisors (see below), whose sum is σ = 16195258735110. Its totient is φ = 7474734800808.

The previous prime is 11212102201219. The next prime is 11212102201241. The reversal of 11212102201221 is 12210220121211.

11212102201221 is a `hidden beast` number, since 1 + 1 + 212 + 10 + 220 + 1 + 221 = 666.

11212102201221 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 only one way, i.e., 11065136544900 + 146965656321 = 3326430^2 + 383361^2 .

It is not a de Polignac number, because 11212102201221 - 2¹ = 11212102201219 is a prime.

It is a super-2 number, since 2×11212102201221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11212102201194 and 11212102201203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212102201241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 622894566726 + ... + 622894566743.

It is an arithmetic number, because the mean of its divisors is an integer number (2699209789185).

Almost surely, 2^{11212102201221} is an apocalyptic number.

It is an amenable number.

11212102201221 is a deficient number, since it is larger than the sum of its proper divisors (4983156533889).

11212102201221 is a wasteful number, since it uses less digits than its factorization.

11212102201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245789133475 (or 1245789133472 counting only the distinct ones).

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

Adding to 11212102201221 its reverse (12210220121211), we get a palindrome (23422322322432).

The spelling of 11212102201221 in words is "eleven trillion, two hundred twelve billion, one hundred two million, two hundred one thousand, two hundred twenty-one".