21100224133 has 8 divisors (see below), whose sum is σ = 22074756480. Its totient is φ = 20147591520.

The previous prime is 21100224053. The next prime is 21100224139. The reversal of 21100224133 is 33142200112.

It is a happy number.

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

It is not a de Polignac number, because 21100224133 - 2¹⁷ = 21100093061 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21100224133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100224139) 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, 5472963 + ... + 5476816.

It is an arithmetic number, because the mean of its divisors is an integer number (2759344560).

Almost surely, 2^21100224133 is an apocalyptic number.

It is an amenable number.

21100224133 is a deficient number, since it is larger than the sum of its proper divisors (974532347).

21100224133 is a wasteful number, since it uses less digits than its factorization.

21100224133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10949867.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21100224133 its reverse (33142200112), we get a palindrome (54242424245).

The spelling of 21100224133 in words is "twenty-one billion, one hundred million, two hundred twenty-four thousand, one hundred thirty-three".