11201212102221 has 24 divisors (see below), whose sum is σ = 16366641567744. Its totient is φ = 7381358517600.

The previous prime is 11201212102189. The next prime is 11201212102253. The reversal of 11201212102221 is 12220121210211.

11201212102221 is a `hidden beast` number, since 11 + 201 + 21 + 210 + 2 + 221 = 666.

It is an interprime number because it is at equal distance from previous prime (11201212102189) and next prime (11201212102253).

It is not a de Polignac number, because 11201212102221 - 2⁵ = 11201212102189 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11201212102194 and 11201212102203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201212102271) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9598621 + ... + 10702146.

It is an arithmetic number, because the mean of its divisors is an integer number (681943398656).

Almost surely, 2^{11201212102221} is an apocalyptic number.

It is an amenable number.

11201212102221 is a deficient number, since it is larger than the sum of its proper divisors (5165429465523).

11201212102221 is a wasteful number, since it uses less digits than its factorization.

11201212102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20301481 (or 20301478 counting only the distinct ones).

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

Adding to 11201212102221 its reverse (12220121210211), we get a palindrome (23421333312432).

The spelling of 11201212102221 in words is "eleven trillion, two hundred one billion, two hundred twelve million, one hundred two thousand, two hundred twenty-one".