211122021220221 has 16 divisors (see below), whose sum is σ = 295304235615360. Its totient is φ = 133980625410240.

The previous prime is 211122021220211. The next prime is 211122021220261. The reversal of 211122021220221 is 122022120221112.

It is not a de Polignac number, because 211122021220221 - 2⁶ = 211122021220157 is a prime.

It is a super-2 number, since 2×211122021220221² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211122021220211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17089359310 + ... + 17089371663.

It is an arithmetic number, because the mean of its divisors is an integer number (18456514725960).

Almost surely, 2^{211122021220221} is an apocalyptic number.

It is an amenable number.

211122021220221 is a deficient number, since it is larger than the sum of its proper divisors (84182214395139).

211122021220221 is a wasteful number, since it uses less digits than its factorization.

211122021220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34178731076.

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

Adding to 211122021220221 its reverse (122022120221112), we get a palindrome (333144141441333).

The spelling of 211122021220221 in words is "two hundred eleven trillion, one hundred twenty-two billion, twenty-one million, two hundred twenty thousand, two hundred twenty-one".