10512503021 has 4 divisors (see below), whose sum is σ = 10512938172. Its totient is φ = 10512067872.

The previous prime is 10512502997. The next prime is 10512503041. The reversal of 10512503021 is 12030521501.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9847585225 + 664917796 = 99235^2 + 25786^2 .

It is a cyclic number.

It is not a de Polignac number, because 10512503021 - 2¹⁰ = 10512501997 is a prime.

It is a super-2 number, since 2×10512503021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10512502984 and 10512503002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10512503041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179066 + ... + 230411.

It is an arithmetic number, because the mean of its divisors is an integer number (2628234543).

Almost surely, 2^10512503021 is an apocalyptic number.

It is an amenable number.

10512503021 is a deficient number, since it is larger than the sum of its proper divisors (435151).

10512503021 is an equidigital number, since it uses as much as digits as its factorization.

10512503021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435150.

The product of its (nonzero) digits is 300, while the sum is 20.

The spelling of 10512503021 in words is "ten billion, five hundred twelve million, five hundred three thousand, twenty-one".