221112121010112 has 168 divisors, whose sum is σ = 682432912652400. Its totient is φ = 68192770940928.

The previous prime is 221112121010089. The next prime is 221112121010113. The reversal of 221112121010112 is 211010121211122.

It is a happy number.

221112121010112 is a `hidden beast` number, since 2 + 211 + 121 + 210 + 10 + 112 = 666.

221112121010112 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221112121010113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 190785787 + ... + 191941242.

It is an arithmetic number, because the mean of its divisors is an integer number (4062100670550).

Almost surely, 2^{221112121010112} is an apocalyptic number.

It is an amenable number.

221112121010112 is an abundant number, since it is smaller than the sum of its proper divisors (461320791642288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221112121010112 is a wasteful number, since it uses less digits than its factorization.

221112121010112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382727123 (or 382727110 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 221112121010112 its reverse (211010121211122), we get a palindrome (432122242221234).

The spelling of 221112121010112 in words is "two hundred twenty-one trillion, one hundred twelve billion, one hundred twenty-one million, ten thousand, one hundred twelve".