30120033221 has 4 divisors (see below), whose sum is σ = 30412460832. Its totient is φ = 29827605612.

The previous prime is 30120033211. The next prime is 30120033241. The reversal of 30120033221 is 12233002103.

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 not a de Polignac number, because 30120033221 - 2¹⁰ = 30120032197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 30120033221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30120033211) 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, 146213651 + ... + 146213856.

It is an arithmetic number, because the mean of its divisors is an integer number (7603115208).

Almost surely, 2^30120033221 is an apocalyptic number.

It is an amenable number.

30120033221 is a deficient number, since it is larger than the sum of its proper divisors (292427611).

30120033221 is a wasteful number, since it uses less digits than its factorization.

30120033221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292427610.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 30120033221 its reverse (12233002103), we get a palindrome (42353035324).

The spelling of 30120033221 in words is "thirty billion, one hundred twenty million, thirty-three thousand, two hundred twenty-one".