10516021 has 2 divisors, whose sum is σ = 10516022. Its totient is φ = 10516020.

The previous prime is 10516007. The next prime is 10516043. The reversal of 10516021 is 12061501.

It is a happy number.

10516021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9696996 + 819025 = 3114^2 + 905^2 .

It is an emirp because it is prime and its reverse (12061501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10516021 - 2⁹ = 10515509 is a prime.

It is a super-2 number, since 2×10516021² = 221173395344882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10515986 and 10516004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10516091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5258010 + 5258011.

It is an arithmetic number, because the mean of its divisors is an integer number (5258011).

Almost surely, 2^10516021 is an apocalyptic number.

It is an amenable number.

10516021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10516021 is an equidigital number, since it uses as much as digits as its factorization.

10516021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 10516021 is about 3242.8415009063. The cubic root of 10516021 is about 219.0872722652.

Adding to 10516021 its reverse (12061501), we get a palindrome (22577522).

The spelling of 10516021 in words is "ten million, five hundred sixteen thousand, twenty-one".