21301232321330 has 64 divisors (see below), whose sum is σ = 43131014535168. Its totient is φ = 7515409566720.

The previous prime is 21301232321329. The next prime is 21301232321357. The reversal of 21301232321330 is 3312323210312.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 21301232321330.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 724706 + ... + 6567165.

It is an arithmetic number, because the mean of its divisors is an integer number (673922102112).

Almost surely, 2^{21301232321330} is an apocalyptic number.

21301232321330 is an abundant number, since it is smaller than the sum of its proper divisors (21829782213838).

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

21301232321330 is a wasteful number, since it uses less digits than its factorization.

21301232321330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7292891.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 21301232321330 its reverse (3312323210312), we get a palindrome (24613555531642).

The spelling of 21301232321330 in words is "twenty-one trillion, three hundred one billion, two hundred thirty-two million, three hundred twenty-one thousand, three hundred thirty".