112100120021 has 4 divisors (see below), whose sum is σ = 112100851500. Its totient is φ = 112099388544.

The previous prime is 112100119981. The next prime is 112100120071. The reversal of 112100120021 is 120021001211.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 120021001211 = 5107 ⋅23501273.

It can be written as a sum of positive squares in 2 ways, for example, as 37475539396 + 74624580625 = 193586^2 + 273175^2 .

It is a cyclic number.

It is not a de Polignac number, because 112100120021 - 2²² = 112095925717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 112100119984 and 112100120011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112100120071) 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, 37916 + ... + 475013.

It is an arithmetic number, because the mean of its divisors is an integer number (28025212875).

Almost surely, 2^112100120021 is an apocalyptic number.

It is an amenable number.

112100120021 is a deficient number, since it is larger than the sum of its proper divisors (731479).

112100120021 is an equidigital number, since it uses as much as digits as its factorization.

112100120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731478.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 112100120021 its reverse (120021001211), we get a palindrome (232121121232).

The spelling of 112100120021 in words is "one hundred twelve billion, one hundred million, one hundred twenty thousand, twenty-one".