30532521221 has 4 divisors (see below), whose sum is σ = 30574987200. Its totient is φ = 30490055244.

The previous prime is 30532521197. The next prime is 30532521233. The reversal of 30532521221 is 12212523503.

It is a happy number.

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 30532521221 - 2³⁰ = 29458779397 is a prime.

It is a super-2 number, since 2×30532521221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30532526221) 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, 21231911 + ... + 21233348.

It is an arithmetic number, because the mean of its divisors is an integer number (7643746800).

Almost surely, 2^30532521221 is an apocalyptic number.

It is an amenable number.

30532521221 is a deficient number, since it is larger than the sum of its proper divisors (42465979).

30532521221 is an equidigital number, since it uses as much as digits as its factorization.

30532521221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42465978.

The product of its (nonzero) digits is 3600, while the sum is 26.

The spelling of 30532521221 in words is "thirty billion, five hundred thirty-two million, five hundred twenty-one thousand, two hundred twenty-one".