21113240330 has 128 divisors (see below), whose sum is σ = 49113146880. Its totient is φ = 6354754560.

The previous prime is 21113240311. The next prime is 21113240411. The reversal of 21113240330 is 3304231112.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1762160 + ... + 1774100.

It is an arithmetic number, because the mean of its divisors is an integer number (383696460).

Almost surely, 2^21113240330 is an apocalyptic number.

21113240330 is an abundant number, since it is smaller than the sum of its proper divisors (27999906550).

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

21113240330 is a wasteful number, since it uses less digits than its factorization.

21113240330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12064.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21113240330 its reverse (3304231112), we get a palindrome (24417471442).

The spelling of 21113240330 in words is "twenty-one billion, one hundred thirteen million, two hundred forty thousand, three hundred thirty".