21231330133 has 8 divisors (see below), whose sum is σ = 22951450368. Its totient is φ = 19523630064.

The previous prime is 21231330091. The next prime is 21231330179. The reversal of 21231330133 is 33103313212.

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 21231330133 - 2⁹ = 21231329621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21231330833) 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 7 ways as a sum of consecutive naturals, for example, 3101485 + ... + 3108322.

It is an arithmetic number, because the mean of its divisors is an integer number (2868931296).

Almost surely, 2^21231330133 is an apocalyptic number.

It is an amenable number.

21231330133 is a deficient number, since it is larger than the sum of its proper divisors (1720120235).

21231330133 is a wasteful number, since it uses less digits than its factorization.

21231330133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6210083.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 21231330133 its reverse (33103313212), we get a palindrome (54334643345).

The spelling of 21231330133 in words is "twenty-one billion, two hundred thirty-one million, three hundred thirty thousand, one hundred thirty-three".