10521013 has 2 divisors, whose sum is σ = 10521014. Its totient is φ = 10521012.

The previous prime is 10521001. The next prime is 10521031. The reversal of 10521013 is 31012501.

Together with next prime (10521031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7273809 + 3247204 = 2697^2 + 1802^2 .

It is a cyclic number.

It is not a de Polignac number, because 10521013 - 2⁵ = 10520981 is a prime.

It is a super-2 number, since 2×10521013² = 221383429092338, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10520984 and 10521002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10521053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5260506 + 5260507.

It is an arithmetic number, because the mean of its divisors is an integer number (5260507).

Almost surely, 2^10521013 is an apocalyptic number.

It is an amenable number.

10521013 is a deficient number, since it is larger than the sum of its proper divisors (1).

10521013 is an equidigital number, since it uses as much as digits as its factorization.

10521013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 10521013 is about 3243.6111049261. The cubic root of 10521013 is about 219.1219340018.

Adding to 10521013 its reverse (31012501), we get a palindrome (41533514).

The spelling of 10521013 in words is "ten million, five hundred twenty-one thousand, thirteen".