21245332113 has 48 divisors (see below), whose sum is σ = 32088394624. Its totient is φ = 13533972480.

The previous prime is 21245332099. The next prime is 21245332151. The reversal of 21245332113 is 31123354212.

21245332113 is a `hidden beast` number, since 2 + 12 + 4 + 533 + 2 + 113 = 666.

It is not a de Polignac number, because 21245332113 - 2⁸ = 21245331857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21245332513) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4553820 + ... + 4558482.

Almost surely, 2^21245332113 is an apocalyptic number.

It is an amenable number.

21245332113 is a deficient number, since it is larger than the sum of its proper divisors (10843062511).

21245332113 is a wasteful number, since it uses less digits than its factorization.

21245332113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4966 (or 4963 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

Adding to 21245332113 its reverse (31123354212), we get a palindrome (52368686325).

The spelling of 21245332113 in words is "twenty-one billion, two hundred forty-five million, three hundred thirty-two thousand, one hundred thirteen".