30021210321 has 16 divisors (see below), whose sum is σ = 41521440000. Its totient is φ = 19271323008.

The previous prime is 30021210239. The next prime is 30021210347. The reversal of 30021210321 is 12301212003.

It is not a de Polignac number, because 30021210321 - 2²¹ = 30019113169 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30021210321.

It is not an unprimeable number, because it can be changed into a prime (30021210221) 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, 438196 + ... + 502053.

It is an arithmetic number, because the mean of its divisors is an integer number (2595090000).

Almost surely, 2^30021210321 is an apocalyptic number.

It is an amenable number.

30021210321 is a deficient number, since it is larger than the sum of its proper divisors (11500229679).

30021210321 is a wasteful number, since it uses less digits than its factorization.

30021210321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940648.

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

Adding to 30021210321 its reverse (12301212003), we get a palindrome (42322422324).

The spelling of 30021210321 in words is "thirty billion, twenty-one million, two hundred ten thousand, three hundred twenty-one".