2112221200221 has 20 divisors (see below), whose sum is σ = 3442138253664. Its totient is φ = 1280134060200.

The previous prime is 2112221200183. The next prime is 2112221200237. The reversal of 2112221200221 is 1220021222112.

It is a happy number.

2112221200221 is a `hidden beast` number, since 21 + 1 + 2 + 221 + 200 + 221 = 666.

It is not a de Polignac number, because 2112221200221 - 2⁹ = 2112221199709 is a prime.

It is a super-2 number, since 2×2112221200221² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2112221200194 and 2112221200203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112221200261) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1185308425 + ... + 1185310206.

Almost surely, 2^{2112221200221} is an apocalyptic number.

It is an amenable number.

2112221200221 is a deficient number, since it is larger than the sum of its proper divisors (1329917053443).

2112221200221 is a wasteful number, since it uses less digits than its factorization.

2112221200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2370618654 (or 2370618645 counting only the distinct ones).

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

Adding to 2112221200221 its reverse (1220021222112), we get a palindrome (3332242422333).

The spelling of 2112221200221 in words is "two trillion, one hundred twelve billion, two hundred twenty-one million, two hundred thousand, two hundred twenty-one".