30033311221 has 4 divisors (see below), whose sum is σ = 31002127744. Its totient is φ = 29064494700.

The previous prime is 30033311177. The next prime is 30033311249. The reversal of 30033311221 is 12211333003.

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 30033311221 - 2⁹ = 30033310709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30033311821) 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, 484408215 + ... + 484408276.

It is an arithmetic number, because the mean of its divisors is an integer number (7750531936).

Almost surely, 2^30033311221 is an apocalyptic number.

30033311221 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

30033311221 is a deficient number, since it is larger than the sum of its proper divisors (968816523).

30033311221 is an equidigital number, since it uses as much as digits as its factorization.

30033311221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968816522.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 30033311221 its reverse (12211333003), we get a palindrome (42244644224).

The spelling of 30033311221 in words is "thirty billion, thirty-three million, three hundred eleven thousand, two hundred twenty-one".