3103120021 has 2 divisors, whose sum is σ = 3103120022. Its totient is φ = 3103120020.

The previous prime is 3103120001. The next prime is 3103120067. The reversal of 3103120021 is 1200213013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2451339121 + 651780900 = 49511^2 + 25530^2 .

It is an emirp because it is prime and its reverse (1200213013) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3103120021 - 2⁷ = 3103119893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3103119983 and 3103120010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3103120001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1551560010 + 1551560011.

It is an arithmetic number, because the mean of its divisors is an integer number (1551560011).

Almost surely, 2^3103120021 is an apocalyptic number.

It is an amenable number.

3103120021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3103120021 is an equidigital number, since it uses as much as digits as its factorization.

3103120021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 3103120021 is about 55705.6551976548. The cubic root of 3103120021 is about 1458.5887440440.

Adding to 3103120021 its reverse (1200213013), we get a palindrome (4303333034).

The spelling of 3103120021 in words is "three billion, one hundred three million, one hundred twenty thousand, twenty-one".