30021220133 has 4 divisors (see below), whose sum is σ = 30178399488. Its totient is φ = 29864040780.

The previous prime is 30021220127. The next prime is 30021220169. The reversal of 30021220133 is 33102212003.

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 30021220133 - 2⁶ = 30021220069 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 (30021420133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78589391 + ... + 78589772.

It is an arithmetic number, because the mean of its divisors is an integer number (7544599872).

Almost surely, 2^30021220133 is an apocalyptic number.

It is an amenable number.

30021220133 is a deficient number, since it is larger than the sum of its proper divisors (157179355).

30021220133 is a wasteful number, since it uses less digits than its factorization.

30021220133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157179354.

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

Adding to 30021220133 its reverse (33102212003), we get a palindrome (63123432136).

The spelling of 30021220133 in words is "thirty billion, twenty-one million, two hundred twenty thousand, one hundred thirty-three".