120868021 has 2 divisors, whose sum is σ = 120868022. Its totient is φ = 120868020.

The previous prime is 120868019. The next prime is 120868031.

120868021 is nontrivially palindromic in base 10.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101727396 + 19140625 = 10086^2 + 4375^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 120868021 - 2¹ = 120868019 is a prime.

Together with 120868019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120868001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60434010 + 60434011.

It is an arithmetic number, because the mean of its divisors is an integer number (60434011).

Almost surely, 2^120868021 is an apocalyptic number.

It is an amenable number.

120868021 is a deficient number, since it is larger than the sum of its proper divisors (1).

120868021 is an equidigital number, since it uses as much as digits as its factorization.

120868021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 120868021 is about 10993.9993178097. Note that the first 3 decimals coincide. The cubic root of 120868021 is about 494.4288497917.

The spelling of 120868021 in words is "one hundred twenty million, eight hundred sixty-eight thousand, twenty-one".