11211022012221 has 24 divisors (see below), whose sum is σ = 16202115689760. Its totient is φ = 7470130389216.

The previous prime is 11211022012213. The next prime is 11211022012237. The reversal of 11211022012221 is 12221022011211.

11211022012221 is a `hidden beast` number, since 1 + 1 + 211 + 0 + 220 + 12 + 221 = 666.

11211022012221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11211022012221 - 2³ = 11211022012213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11211022012194 and 11211022012203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211022012291) 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, 431130406 + ... + 431156408.

It is an arithmetic number, because the mean of its divisors is an integer number (675088153740).

Almost surely, 2^{11211022012221} is an apocalyptic number.

It is an amenable number.

11211022012221 is a deficient number, since it is larger than the sum of its proper divisors (4991093677539).

11211022012221 is a wasteful number, since it uses less digits than its factorization.

11211022012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49065 (or 49062 counting only the distinct ones).

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

Adding to 11211022012221 its reverse (12221022011211), we get a palindrome (23432044023432).

The spelling of 11211022012221 in words is "eleven trillion, two hundred eleven billion, twenty-two million, twelve thousand, two hundred twenty-one".