3120021321173 has 2 divisors, whose sum is σ = 3120021321174. Its totient is φ = 3120021321172.

The previous prime is 3120021321149. The next prime is 3120021321187. The reversal of 3120021321173 is 3711231200213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3119328210244 + 693110929 = 1766162^2 + 26327^2 .

It is an emirp because it is prime and its reverse (3711231200213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3120021321173 - 2³² = 3115726353877 is a prime.

It is a super-2 number, since 2×3120021321173² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3120021321673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560010660586 + 1560010660587.

It is an arithmetic number, because the mean of its divisors is an integer number (1560010660587).

Almost surely, 2^{3120021321173} is an apocalyptic number.

It is an amenable number.

3120021321173 is a deficient number, since it is larger than the sum of its proper divisors (1).

3120021321173 is an equidigital number, since it uses as much as digits as its factorization.

3120021321173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 26.

Adding to 3120021321173 its reverse (3711231200213), we get a palindrome (6831252521386).

The spelling of 3120021321173 in words is "three trillion, one hundred twenty billion, twenty-one million, three hundred twenty-one thousand, one hundred seventy-three".