11211222022221 has 32 divisors (see below), whose sum is σ = 16993441261440. Its totient is φ = 6517581041664.

The previous prime is 11211222022127. The next prime is 11211222022223. The reversal of 11211222022221 is 12222022211211.

11211222022221 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 11211222022221 - 2¹⁵ = 11211221989453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211222022223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21168816 + ... + 21691961.

It is an arithmetic number, because the mean of its divisors is an integer number (531045039420).

Almost surely, 2^{11211222022221} is an apocalyptic number.

It is an amenable number.

11211222022221 is a deficient number, since it is larger than the sum of its proper divisors (5782219239219).

11211222022221 is a wasteful number, since it uses less digits than its factorization.

11211222022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42861165.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 11211222022221 its reverse (12222022211211), we get a palindrome (23433244233432).

The spelling of 11211222022221 in words is "eleven trillion, two hundred eleven billion, two hundred twenty-two million, twenty-two thousand, two hundred twenty-one".