10521216503 has 8 divisors (see below), whose sum is σ = 12657102720. Its totient is φ = 8543544120.

The previous prime is 10521216493. The next prime is 10521216509. The reversal of 10521216503 is 30561212501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10521216503 - 2¹⁶ = 10521150967 is a prime.

It is a super-3 number, since 3×10521216503³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10521216509) 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 in 7 ways as a sum of consecutive naturals, for example, 39553313 + ... + 39553578.

It is an arithmetic number, because the mean of its divisors is an integer number (1582137840).

Almost surely, 2^10521216503 is an apocalyptic number.

10521216503 is a deficient number, since it is larger than the sum of its proper divisors (2135886217).

10521216503 is an equidigital number, since it uses as much as digits as its factorization.

10521216503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79106917.

The product of its (nonzero) digits is 1800, while the sum is 26.

The spelling of 10521216503 in words is "ten billion, five hundred twenty-one million, two hundred sixteen thousand, five hundred three".