21000111330 has 64 divisors (see below), whose sum is σ = 56878070400. Its totient is φ = 4915384320.

The previous prime is 21000111329. The next prime is 21000111343. The reversal of 21000111330 is 3311100012.

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, 1087615 + ... + 1106754.

It is an arithmetic number, because the mean of its divisors is an integer number (888719850).

Almost surely, 2^21000111330 is an apocalyptic number.

21000111330 is an abundant number, since it is smaller than the sum of its proper divisors (35877959070).

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

21000111330 is a wasteful number, since it uses less digits than its factorization.

21000111330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2194419.

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 21000111330 its reverse (3311100012), we get a palindrome (24311211342).

The spelling of 21000111330 in words is "twenty-one billion, one hundred eleven thousand, three hundred thirty".