120016021 has 2 divisors, whose sum is σ = 120016022. Its totient is φ = 120016020.

The previous prime is 120016019. The next prime is 120016031. The reversal of 120016021 is 120610021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94361796 + 25654225 = 9714^2 + 5065^2 .

It is a cyclic number.

It is not a de Polignac number, because 120016021 - 2¹ = 120016019 is a prime.

Together with 120016019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 120015992 and 120016010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120016031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60008010 + 60008011.

It is an arithmetic number, because the mean of its divisors is an integer number (60008011).

Almost surely, 2^120016021 is an apocalyptic number.

It is an amenable number.

120016021 is a deficient number, since it is larger than the sum of its proper divisors (1).

120016021 is an equidigital number, since it uses as much as digits as its factorization.

120016021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 120016021 is about 10955.1823809556. The cubic root of 120016021 is about 493.2643645469.

Adding to 120016021 its reverse (120610021), we get a palindrome (240626042).

The spelling of 120016021 in words is "one hundred twenty million, sixteen thousand, twenty-one".