112020721 has 4 divisors (see below), whose sum is σ = 112065012. Its totient is φ = 111976432.

The previous prime is 112020697. The next prime is 112020749. The reversal of 112020721 is 127020211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41460721 + 70560000 = 6439^2 + 8400^2 .

It is a cyclic number.

It is not a de Polignac number, because 112020721 - 2¹⁷ = 111889649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 112020695 and 112020704.

It is not an unprimeable number, because it can be changed into a prime (112020781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18106 + ... + 23491.

It is an arithmetic number, because the mean of its divisors is an integer number (28016253).

Almost surely, 2^112020721 is an apocalyptic number.

It is an amenable number.

112020721 is a deficient number, since it is larger than the sum of its proper divisors (44291).

112020721 is an equidigital number, since it uses as much as digits as its factorization.

112020721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44290.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 112020721 is about 10583.9841742134. The cubic root of 112020721 is about 482.0581775245.

Adding to 112020721 its reverse (127020211), we get a palindrome (239040932).

The spelling of 112020721 in words is "one hundred twelve million, twenty thousand, seven hundred twenty-one".