21113221030 has 96 divisors (see below), whose sum is σ = 42350817600. Its totient is φ = 7572153600.

The previous prime is 21113221007. The next prime is 21113221039. The reversal of 21113221030 is 3012231112.

It is a junction number, because it is equal to n+sod(n) for n = 21113220995 and 21113221013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113221039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32632167 + ... + 32632813.

It is an arithmetic number, because the mean of its divisors is an integer number (441154350).

Almost surely, 2^21113221030 is an apocalyptic number.

21113221030 is an abundant number, since it is smaller than the sum of its proper divisors (21237596570).

21113221030 is a wasteful number, since it uses less digits than its factorization.

21113221030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006 (or 995 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21113221030 its reverse (3012231112), we get a palindrome (24125452142).

The spelling of 21113221030 in words is "twenty-one billion, one hundred thirteen million, two hundred twenty-one thousand, thirty".