21221201133 has 48 divisors (see below), whose sum is σ = 35447922432. Its totient is φ = 12090624000.

The previous prime is 21221201129. The next prime is 21221201161. The reversal of 21221201133 is 33110212212.

It is not a de Polignac number, because 21221201133 - 2² = 21221201129 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21221208133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1526293 + ... + 1540133.

It is an arithmetic number, because the mean of its divisors is an integer number (738498384).

Almost surely, 2^21221201133 is an apocalyptic number.

It is an amenable number.

21221201133 is a deficient number, since it is larger than the sum of its proper divisors (14226721299).

21221201133 is a wasteful number, since it uses less digits than its factorization.

21221201133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14786 (or 14783 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21221201133 its reverse (33110212212), we get a palindrome (54331413345).

The spelling of 21221201133 in words is "twenty-one billion, two hundred twenty-one million, two hundred one thousand, one hundred thirty-three".