120112021 has 4 divisors (see below), whose sum is σ = 127177452. Its totient is φ = 113046592.

The previous prime is 120112019. The next prime is 120112033. The reversal of 120112021 is 120211021.

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 59505796 + 60606225 = 7714^2 + 7785^2 .

It is a cyclic number.

It is not a de Polignac number, because 120112021 - 2¹ = 120112019 is a prime.

It is a super-5 number, since 5×120112021⁵ (a number of 42 digits) contains 55555 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120111989 and 120112007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120112051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3532690 + ... + 3532723.

It is an arithmetic number, because the mean of its divisors is an integer number (31794363).

Almost surely, 2^120112021 is an apocalyptic number.

It is an amenable number.

120112021 is a deficient number, since it is larger than the sum of its proper divisors (7065431).

120112021 is an equidigital number, since it uses as much as digits as its factorization.

120112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7065430.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 120112021 is about 10959.5629931125. The cubic root of 120112021 is about 493.3958491002.

Adding to 120112021 its reverse (120211021), we get a palindrome (240323042).

The spelling of 120112021 in words is "one hundred twenty million, one hundred twelve thousand, twenty-one".