10002203521 has 4 divisors (see below), whose sum is σ = 10590568452. Its totient is φ = 9413838592.

The previous prime is 10002203447. The next prime is 10002203539. The reversal of 10002203521 is 12530220001.

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 8165652496 + 1836551025 = 90364^2 + 42855^2 .

It is a cyclic number.

It is not a de Polignac number, because 10002203521 - 2¹⁵ = 10002170753 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10002203495 and 10002203504.

It is not an unprimeable number, because it can be changed into a prime (10002203581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294182440 + ... + 294182473.

It is an arithmetic number, because the mean of its divisors is an integer number (2647642113).

Almost surely, 2^10002203521 is an apocalyptic number.

It is an amenable number.

10002203521 is a deficient number, since it is larger than the sum of its proper divisors (588364931).

10002203521 is an equidigital number, since it uses as much as digits as its factorization.

10002203521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588364930.

The product of its (nonzero) digits is 120, while the sum is 16.

Adding to 10002203521 its reverse (12530220001), we get a palindrome (22532423522).

The spelling of 10002203521 in words is "ten billion, two million, two hundred three thousand, five hundred twenty-one".