21041320311330 has 64 divisors (see below), whose sum is σ = 56129436321408. Its totient is φ = 5004682242560.

The previous prime is 21041320311293. The next prime is 21041320311377. The reversal of 21041320311330 is 3311302314012.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21041320311330.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 601506819 + ... + 601541798.

It is an arithmetic number, because the mean of its divisors is an integer number (877022442522).

Almost surely, 2^{21041320311330} is an apocalyptic number.

21041320311330 is an abundant number, since it is smaller than the sum of its proper divisors (35088116010078).

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

21041320311330 is a wasteful number, since it uses less digits than its factorization.

21041320311330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203048691.

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

Adding to 21041320311330 its reverse (3311302314012), we get a palindrome (24352622625342).

The spelling of 21041320311330 in words is "twenty-one trillion, forty-one billion, three hundred twenty million, three hundred eleven thousand, three hundred thirty".