30321213021 has 48 divisors (see below), whose sum is σ = 49008697920. Its totient is φ = 17904672000.

The previous prime is 30321212993. The next prime is 30321213031. The reversal of 30321213021 is 12031212303.

30321213021 is a `hidden beast` number, since 303 + 212 + 130 + 21 = 666.

It is not a de Polignac number, because 30321213021 - 2¹¹ = 30321210973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30321212985 and 30321213003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30321213031) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3360406 + ... + 3369416.

It is an arithmetic number, because the mean of its divisors is an integer number (1021014540).

Almost surely, 2^30321213021 is an apocalyptic number.

It is an amenable number.

30321213021 is a deficient number, since it is larger than the sum of its proper divisors (18687484899).

30321213021 is a wasteful number, since it uses less digits than its factorization.

30321213021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9898 (or 9895 counting only the distinct ones).

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

Adding to 30321213021 its reverse (12031212303), we get a palindrome (42352425324).

It can be divided in two parts, 30321 and 213021, that added together give a palindrome (243342).

The spelling of 30321213021 in words is "thirty billion, three hundred twenty-one million, two hundred thirteen thousand, twenty-one".