2112021022221 has 16 divisors (see below), whose sum is σ = 3413367309120. Its totient is φ = 1280012740560.

The previous prime is 2112021022117. The next prime is 2112021022253. The reversal of 2112021022221 is 1222201202112.

It is a happy number.

2112021022221 is a `hidden beast` number, since 211 + 2 + 0 + 210 + 22 + 221 = 666.

It is not a de Polignac number, because 2112021022221 - 2¹⁸ = 2112020760077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2112021022194 and 2112021022203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112021022271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3555590650 + ... + 3555591243.

It is an arithmetic number, because the mean of its divisors is an integer number (213335456820).

Almost surely, 2^{2112021022221} is an apocalyptic number.

It is an amenable number.

2112021022221 is a deficient number, since it is larger than the sum of its proper divisors (1301346286899).

2112021022221 is a wasteful number, since it uses less digits than its factorization.

2112021022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7111181913 (or 7111181907 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2112021022221 its reverse (1222201202112), we get a palindrome (3334222224333).

The spelling of 2112021022221 in words is "two trillion, one hundred twelve billion, twenty-one million, twenty-two thousand, two hundred twenty-one".