21113001232 has 20 divisors (see below), whose sum is σ = 41086651536. Its totient is φ = 10509994400.

The previous prime is 21113001223. The next prime is 21113001251. The reversal of 21113001232 is 23210031112.

It is a Harshad number since it is a multiple of its sum of digits (16).

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, 2902894 + ... + 2910157.

Almost surely, 2^21113001232 is an apocalyptic number.

It is an amenable number.

21113001232 is a deficient number, since it is larger than the sum of its proper divisors (19973650304).

21113001232 is a wasteful number, since it uses less digits than its factorization.

21113001232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5813286 (or 5813280 counting only the distinct ones).

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

Adding to 21113001232 its reverse (23210031112), we get a palindrome (44323032344).

The spelling of 21113001232 in words is "twenty-one billion, one hundred thirteen million, one thousand, two hundred thirty-two".