221112210021 has 8 divisors (see below), whose sum is σ = 295045002240. Its totient is φ = 147293778912.

The previous prime is 221112210019. The next prime is 221112210061. The reversal of 221112210021 is 120012211122.

221112210021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221112210021 - 2¹ = 221112210019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221112210061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28585765 + ... + 28593498.

It is an arithmetic number, because the mean of its divisors is an integer number (36880625280).

Almost surely, 2^221112210021 is an apocalyptic number.

It is an amenable number.

221112210021 is a deficient number, since it is larger than the sum of its proper divisors (73932792219).

221112210021 is a wasteful number, since it uses less digits than its factorization.

221112210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57180555.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221112210021 its reverse (120012211122), we get a palindrome (341124421143).

The spelling of 221112210021 in words is "two hundred twenty-one billion, one hundred twelve million, two hundred ten thousand, twenty-one".