30203211021 has 4 divisors (see below), whose sum is σ = 40270948032. Its totient is φ = 20135474012.

The previous prime is 30203211019. The next prime is 30203211043. The reversal of 30203211021 is 12011230203.

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 30203211021 - 2¹ = 30203211019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30203211121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5033868501 + ... + 5033868506.

It is an arithmetic number, because the mean of its divisors is an integer number (10067737008).

Almost surely, 2^30203211021 is an apocalyptic number.

It is an amenable number.

30203211021 is a deficient number, since it is larger than the sum of its proper divisors (10067737011).

30203211021 is a wasteful number, since it uses less digits than its factorization.

30203211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10067737010.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 30203211021 its reverse (12011230203), we get a palindrome (42214441224).

The spelling of 30203211021 in words is "thirty billion, two hundred three million, two hundred eleven thousand, twenty-one".