21302030321 has 8 divisors (see below), whose sum is σ = 25026161664. Its totient is φ = 17875829520.

The previous prime is 21302030263. The next prime is 21302030327. The reversal of 21302030321 is 12303020312.

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 21302030321 - 2⁶ = 21302030257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21302030321.

It is not an unprimeable number, because it can be changed into a prime (21302030327) 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, 74482481 + ... + 74482766.

It is an arithmetic number, because the mean of its divisors is an integer number (3128270208).

Almost surely, 2^21302030321 is an apocalyptic number.

It is an amenable number.

21302030321 is a deficient number, since it is larger than the sum of its proper divisors (3724131343).

21302030321 is a wasteful number, since it uses less digits than its factorization.

21302030321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148965271.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21302030321 its reverse (12303020312), we get a palindrome (33605050633).

The spelling of 21302030321 in words is "twenty-one billion, three hundred two million, thirty thousand, three hundred twenty-one".