21113120432 has 20 divisors (see below), whose sum is σ = 40916323896. Its totient is φ = 10554069120.

The previous prime is 21113120401. The next prime is 21113120459. The reversal of 21113120432 is 23402131112.

It is a super-2 number, since 2×21113120432² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84794 + ... + 222297.

Almost surely, 2^21113120432 is an apocalyptic number.

It is an amenable number.

21113120432 is a deficient number, since it is larger than the sum of its proper divisors (19803203464).

21113120432 is a wasteful number, since it uses less digits than its factorization.

21113120432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311396 (or 311390 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21113120432 its reverse (23402131112), we get a palindrome (44515251544).

The spelling of 21113120432 in words is "twenty-one billion, one hundred thirteen million, one hundred twenty thousand, four hundred thirty-two".