21113443132 has 6 divisors (see below), whose sum is σ = 36948525488. Its totient is φ = 10556721564.

The previous prime is 21113443111. The next prime is 21113443181. The reversal of 21113443132 is 23134431112.

It is a junction number, because it is equal to n+sod(n) for n = 21113443097 and 21113443106.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2639180388 + ... + 2639180395.

Almost surely, 2^21113443132 is an apocalyptic number.

It is an amenable number.

21113443132 is a deficient number, since it is larger than the sum of its proper divisors (15835082356).

21113443132 is a wasteful number, since it uses less digits than its factorization.

21113443132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5278360787 (or 5278360785 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

Adding to 21113443132 its reverse (23134431112), we get a palindrome (44247874244).

The spelling of 21113443132 in words is "twenty-one billion, one hundred thirteen million, four hundred forty-three thousand, one hundred thirty-two".