3120020120689 has 2 divisors, whose sum is σ = 3120020120690. Its totient is φ = 3120020120688.

The previous prime is 3120020120687. The next prime is 3120020120713. The reversal of 3120020120689 is 9860210200213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2917322072289 + 202698048400 = 1708017^2 + 450220^2 .

It is a cyclic number.

It is not a de Polignac number, because 3120020120689 - 2¹ = 3120020120687 is a prime.

Together with 3120020120687, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3120020120683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560010060344 + 1560010060345.

It is an arithmetic number, because the mean of its divisors is an integer number (1560010060345).

Almost surely, 2^{3120020120689} is an apocalyptic number.

It is an amenable number.

3120020120689 is a deficient number, since it is larger than the sum of its proper divisors (1).

3120020120689 is an equidigital number, since it uses as much as digits as its factorization.

3120020120689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The spelling of 3120020120689 in words is "three trillion, one hundred twenty billion, twenty million, one hundred twenty thousand, six hundred eighty-nine".