21331124633 has 8 divisors (see below), whose sum is σ = 26253691968. Its totient is φ = 16877373264.

The previous prime is 21331124593. The next prime is 21331124641. The reversal of 21331124633 is 33642113312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21331124633 - 2²⁰ = 21330076057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21331124596 and 21331124605.

It is not an unprimeable number, because it can be changed into a prime (21331124693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117203891 + ... + 117204072.

It is an arithmetic number, because the mean of its divisors is an integer number (3281711496).

Almost surely, 2^21331124633 is an apocalyptic number.

It is an amenable number.

21331124633 is a deficient number, since it is larger than the sum of its proper divisors (4922567335).

21331124633 is a wasteful number, since it uses less digits than its factorization.

21331124633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234407983.

The product of its digits is 7776, while the sum is 29.

Adding to 21331124633 its reverse (33642113312), we get a palindrome (54973237945).

The spelling of 21331124633 in words is "twenty-one billion, three hundred thirty-one million, one hundred twenty-four thousand, six hundred thirty-three".