112100221021 has 4 divisors (see below), whose sum is σ = 112307430844. Its totient is φ = 111893011200.

The previous prime is 112100220979. The next prime is 112100221039. The reversal of 112100221021 is 120122001211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120122001211 = 911 ⋅131857301.

It can be written as a sum of positive squares in 2 ways, for example, as 34498976121 + 77601244900 = 185739^2 + 278570^2 .

It is a cyclic number.

It is not a de Polignac number, because 112100221021 - 2¹¹ = 112100218973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 112100220992 and 112100221010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112100221081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103604100 + ... + 103605181.

It is an arithmetic number, because the mean of its divisors is an integer number (28076857711).

Almost surely, 2^112100221021 is an apocalyptic number.

It is an amenable number.

112100221021 is a deficient number, since it is larger than the sum of its proper divisors (207209823).

112100221021 is an equidigital number, since it uses as much as digits as its factorization.

112100221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207209822.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 112100221021 its reverse (120122001211), we get a palindrome (232222222232).

The spelling of 112100221021 in words is "one hundred twelve billion, one hundred million, two hundred twenty-one thousand, twenty-one".