21111320332 has 12 divisors (see below), whose sum is σ = 37845903816. Its totient is φ = 10298204960.

The previous prime is 21111320317. The next prime is 21111320353. The reversal of 21111320332 is 23302311112.

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 3 ways as a sum of consecutive naturals, for example, 64363618 + ... + 64363945.

It is an arithmetic number, because the mean of its divisors is an integer number (3153825318).

Almost surely, 2^21111320332 is an apocalyptic number.

It is an amenable number.

21111320332 is a deficient number, since it is larger than the sum of its proper divisors (16734583484).

21111320332 is a wasteful number, since it uses less digits than its factorization.

21111320332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128727608 (or 128727606 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21111320332 its reverse (23302311112), we get a palindrome (44413631444).

The spelling of 21111320332 in words is "twenty-one billion, one hundred eleven million, three hundred twenty thousand, three hundred thirty-two".