2112012221 has 16 divisors (see below), whose sum is σ = 2473918848. Its totient is φ = 1781606400.

The previous prime is 2112012193. The next prime is 2112012223. The reversal of 2112012221 is 1222102112.

It is a cyclic number.

It is not a de Polignac number, because 2112012221 - 2⁶ = 2112012157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2112012196 and 2112012205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112012223) 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, 66260 + ... + 92813.

It is an arithmetic number, because the mean of its divisors is an integer number (154619928).

Almost surely, 2^2112012221 is an apocalyptic number.

It is an amenable number.

2112012221 is a deficient number, since it is larger than the sum of its proper divisors (361906627).

2112012221 is a wasteful number, since it uses less digits than its factorization.

2112012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159172.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 2112012221 is about 45956.6341348015. The cubic root of 2112012221 is about 1283.0162066954.

Adding to 2112012221 its reverse (1222102112), we get a palindrome (3334114333).

The spelling of 2112012221 in words is "two billion, one hundred twelve million, twelve thousand, two hundred twenty-one".