30121221033 has 8 divisors (see below), whose sum is σ = 44624031200. Its totient is φ = 20080814004.

The previous prime is 30121221023. The next prime is 30121221101. The reversal of 30121221033 is 33012212103.

It is not a de Polignac number, because 30121221033 - 2⁵ = 30121221001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30121220997 and 30121221015.

It is not an unprimeable number, because it can be changed into a prime (30121221023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 557800363 + ... + 557800416.

It is an arithmetic number, because the mean of its divisors is an integer number (5578003900).

Almost surely, 2^30121221033 is an apocalyptic number.

It is an amenable number.

30121221033 is a deficient number, since it is larger than the sum of its proper divisors (14502810167).

30121221033 is a wasteful number, since it uses less digits than its factorization.

30121221033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115600788 (or 1115600782 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 30121221033 its reverse (33012212103), we get a palindrome (63133433136).

The spelling of 30121221033 in words is "thirty billion, one hundred twenty-one million, two hundred twenty-one thousand, thirty-three".