221021112110112 has 72 divisors (see below), whose sum is σ = 634631008886784. Its totient is φ = 72958425346944.

The previous prime is 221021112110081. The next prime is 221021112110173. The reversal of 221021112110112 is 211011211120122.

It is a happy number.

221021112110112 is a `hidden beast` number, since 2 + 210 + 211 + 121 + 10 + 112 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3725380128 + ... + 3725439455.

It is an arithmetic number, because the mean of its divisors is an integer number (8814319567872).

Almost surely, 2^{221021112110112} is an apocalyptic number.

It is an amenable number.

221021112110112 is an abundant number, since it is smaller than the sum of its proper divisors (413609896776672).

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

221021112110112 is a wasteful number, since it uses less digits than its factorization.

221021112110112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7450819702 (or 7450819691 counting only the distinct ones).

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

Adding to 221021112110112 its reverse (211011211120122), we get a palindrome (432032323230234).

The spelling of 221021112110112 in words is "two hundred twenty-one trillion, twenty-one billion, one hundred twelve million, one hundred ten thousand, one hundred twelve".