2061321013 has 2 divisors, whose sum is σ = 2061321014. Its totient is φ = 2061321012.

The previous prime is 2061321007. The next prime is 2061321047. The reversal of 2061321013 is 3101231602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1895992849 + 165328164 = 43543^2 + 12858^2 .

It is a cyclic number.

It is not a de Polignac number, because 2061321013 - 2¹⁷ = 2061189941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2061321113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1030660506 + 1030660507.

It is an arithmetic number, because the mean of its divisors is an integer number (1030660507).

Almost surely, 2^2061321013 is an apocalyptic number.

It is an amenable number.

2061321013 is a deficient number, since it is larger than the sum of its proper divisors (1).

2061321013 is an equidigital number, since it uses as much as digits as its factorization.

2061321013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 2061321013 is about 45401.7732362955. The cubic root of 2061321013 is about 1272.6682514842.

Adding to 2061321013 its reverse (3101231602), we get a palindrome (5162552615).

The spelling of 2061321013 in words is "two billion, sixty-one million, three hundred twenty-one thousand, thirteen".