30321220021 has 8 divisors (see below), whose sum is σ = 31167811584. Its totient is φ = 29476054800.

The previous prime is 30321220003. The next prime is 30321220037. The reversal of 30321220021 is 12002212303.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30321220021 - 2¹⁷ = 30321088949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30321219977 and 30321220004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30321220081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 313405 + ... + 398578.

It is an arithmetic number, because the mean of its divisors is an integer number (3895976448).

Almost surely, 2^30321220021 is an apocalyptic number.

It is an amenable number.

30321220021 is a deficient number, since it is larger than the sum of its proper divisors (846591563).

30321220021 is a wasteful number, since it uses less digits than its factorization.

30321220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713171.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 30321220021 its reverse (12002212303), we get a palindrome (42323432324).

The spelling of 30321220021 in words is "thirty billion, three hundred twenty-one million, two hundred twenty thousand, twenty-one".