2121020039 has 2 divisors, whose sum is σ = 2121020040. Its totient is φ = 2121020038.

The previous prime is 2121019997. The next prime is 2121020051. The reversal of 2121020039 is 9300201212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2121020039 - 2¹² = 2121015943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2121020039.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121020339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060510019 + 1060510020.

It is an arithmetic number, because the mean of its divisors is an integer number (1060510020).

Almost surely, 2^2121020039 is an apocalyptic number.

2121020039 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121020039 is an equidigital number, since it uses as much as digits as its factorization.

2121020039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 2121020039 is about 46054.5333164934. The cubic root of 2121020039 is about 1284.8376583863.

The spelling of 2121020039 in words is "two billion, one hundred twenty-one million, twenty thousand, thirty-nine".