21533353201 has 8 divisors (see below), whose sum is σ = 22818816000. Its totient is φ = 20263103280.

The previous prime is 21533353187. The next prime is 21533353223. The reversal of 21533353201 is 10235333512.

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

It is not a de Polignac number, because 21533353201 - 2¹¹ = 21533351153 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 21533353201.

It is not an unprimeable number, because it can be changed into a prime (21533353271) 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, 3800305 + ... + 3805966.

It is an arithmetic number, because the mean of its divisors is an integer number (2852352000).

Almost surely, 2^21533353201 is an apocalyptic number.

It is an amenable number.

21533353201 is a deficient number, since it is larger than the sum of its proper divisors (1285462799).

21533353201 is a wasteful number, since it uses less digits than its factorization.

21533353201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7606439.

The product of its (nonzero) digits is 8100, while the sum is 28.

Adding to 21533353201 its reverse (10235333512), we get a palindrome (31768686713).

The spelling of 21533353201 in words is "twenty-one billion, five hundred thirty-three million, three hundred fifty-three thousand, two hundred one".