30133220021 has 4 divisors (see below), whose sum is σ = 30133892544. Its totient is φ = 30132547500.

The previous prime is 30133220017. The next prime is 30133220077. The reversal of 30133220021 is 12002233103.

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 30133220021 - 2² = 30133220017 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 (30133220521) 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, 263855 + ... + 360396.

It is an arithmetic number, because the mean of its divisors is an integer number (7533473136).

Almost surely, 2^30133220021 is an apocalyptic number.

It is an amenable number.

30133220021 is a deficient number, since it is larger than the sum of its proper divisors (672523).

30133220021 is an equidigital number, since it uses as much as digits as its factorization.

30133220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672522.

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

Adding to 30133220021 its reverse (12002233103), we get a palindrome (42135453124).

The spelling of 30133220021 in words is "thirty billion, one hundred thirty-three million, two hundred twenty thousand, twenty-one".