120808021 has 2 divisors, whose sum is σ = 120808022. Its totient is φ = 120808020.

The previous prime is 120808013. The next prime is 120808043.

120808021 is nontrivially palindromic in base 10.

It is an a-pointer prime, because the next prime (120808043) can be obtained adding 120808021 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112656996 + 8151025 = 10614^2 + 2855^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 120808021 - 2³ = 120808013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120807983 and 120808001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120808081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60404010 + 60404011.

It is an arithmetic number, because the mean of its divisors is an integer number (60404011).

Almost surely, 2^120808021 is an apocalyptic number.

It is an amenable number.

120808021 is a deficient number, since it is larger than the sum of its proper divisors (1).

120808021 is an equidigital number, since it uses as much as digits as its factorization.

120808021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 120808021 is about 10991.2702177683. The cubic root of 120808021 is about 494.3470232372.

The spelling of 120808021 in words is "one hundred twenty million, eight hundred eight thousand, twenty-one".