21330221321130 has 16 divisors (see below), whose sum is σ = 51192531170784. Its totient is φ = 5688059018960.

The previous prime is 21330221321117. The next prime is 21330221321177. The reversal of 21330221321130 is 3112312203312.

It is a self number, because there is not a number n which added to its sum of digits gives 21330221321130.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355503688656 + ... + 355503688715.

It is an arithmetic number, because the mean of its divisors is an integer number (3199533198174).

Almost surely, 2^{21330221321130} is an apocalyptic number.

21330221321130 is an abundant number, since it is smaller than the sum of its proper divisors (29862309849654).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21330221321130 is a wasteful number, since it uses less digits than its factorization.

21330221321130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711007377381.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 21330221321130 its reverse (3112312203312), we get a palindrome (24442533524442).

The spelling of 21330221321130 in words is "twenty-one trillion, three hundred thirty billion, two hundred twenty-one million, three hundred twenty-one thousand, one hundred thirty".