22004130521 has 4 divisors (see below), whose sum is σ = 22960831872. Its totient is φ = 21047429172.

The previous prime is 22004130517. The next prime is 22004130529. The reversal of 22004130521 is 12503140022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12503140022 = 2 ⋅6251570011.

It is a cyclic number.

It is not a de Polignac number, because 22004130521 - 2² = 22004130517 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22004130493 and 22004130502.

It is not an unprimeable number, because it can be changed into a prime (22004130529) 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, 478350641 + ... + 478350686.

It is an arithmetic number, because the mean of its divisors is an integer number (5740207968).

Almost surely, 2^22004130521 is an apocalyptic number.

It is an amenable number.

22004130521 is a deficient number, since it is larger than the sum of its proper divisors (956701351).

22004130521 is an equidigital number, since it uses as much as digits as its factorization.

22004130521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956701350.

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 22004130521 its reverse (12503140022), we get a palindrome (34507270543).

The spelling of 22004130521 in words is "twenty-two billion, four million, one hundred thirty thousand, five hundred twenty-one".