30233121021 has 16 divisors (see below), whose sum is σ = 45293068800. Its totient is φ = 19928947104.

The previous prime is 30233121013. The next prime is 30233121053. The reversal of 30233121021 is 12012133203.

30233121021 is a `hidden beast` number, since 302 + 331 + 2 + 10 + 21 = 666.

It is not a de Polignac number, because 30233121021 - 2³ = 30233121013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30233120985 and 30233121003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30233121221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6288301 + ... + 6293106.

It is an arithmetic number, because the mean of its divisors is an integer number (2830816800).

Almost surely, 2^30233121021 is an apocalyptic number.

It is an amenable number.

30233121021 is a deficient number, since it is larger than the sum of its proper divisors (15059947779).

30233121021 is a wasteful number, since it uses less digits than its factorization.

30233121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12581505 (or 12581499 counting only the distinct ones).

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

Adding to 30233121021 its reverse (12012133203), we get a palindrome (42245254224).

The spelling of 30233121021 in words is "thirty billion, two hundred thirty-three million, one hundred twenty-one thousand, twenty-one".