30320133221 has 24 divisors (see below), whose sum is σ = 35692193880. Its totient is φ = 25678743552.

The previous prime is 30320133169. The next prime is 30320133227. The reversal of 30320133221 is 12233102303.

It can be written as a sum of positive squares in 4 ways, for example, as 643180321 + 29676952900 = 25361^2 + 172270^2 .

It is not a de Polignac number, because 30320133221 - 2²⁶ = 30253024357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30320133193 and 30320133202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30320133227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3098825 + ... + 3108593.

It is an arithmetic number, because the mean of its divisors is an integer number (1487174745).

Almost surely, 2^30320133221 is an apocalyptic number.

It is an amenable number.

30320133221 is a deficient number, since it is larger than the sum of its proper divisors (5372060659).

30320133221 is an equidigital number, since it uses as much as digits as its factorization.

30320133221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10533 (or 10526 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 30320133221 its reverse (12233102303), we get a palindrome (42553235524).

The spelling of 30320133221 in words is "thirty billion, three hundred twenty million, one hundred thirty-three thousand, two hundred twenty-one".