213325011521 has 4 divisors (see below), whose sum is σ = 213328068912. Its totient is φ = 213321954132.

The previous prime is 213325011511. The next prime is 213325011589. The reversal of 213325011521 is 125110523312.

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.

It is a cyclic number.

It is not a de Polignac number, because 213325011521 - 2³⁰ = 212251269697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213325011511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1421531 + ... + 1564416.

It is an arithmetic number, because the mean of its divisors is an integer number (53332017228).

Almost surely, 2^213325011521 is an apocalyptic number.

It is an amenable number.

213325011521 is a deficient number, since it is larger than the sum of its proper divisors (3057391).

213325011521 is an equidigital number, since it uses as much as digits as its factorization.

213325011521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3057390.

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

Adding to 213325011521 its reverse (125110523312), we get a palindrome (338435534833).

The spelling of 213325011521 in words is "two hundred thirteen billion, three hundred twenty-five million, eleven thousand, five hundred twenty-one".