21001233210133 has 8 divisors (see below), whose sum is σ = 22911230230560. Its totient is φ = 19091368523280.

The previous prime is 21001233210031. The next prime is 21001233210149. The reversal of 21001233210133 is 33101233210012.

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 21001233210133 - 2²⁵ = 21001199655701 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 (21001233220133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32751418 + ... + 33386491.

It is an arithmetic number, because the mean of its divisors is an integer number (2863903778820).

Almost surely, 2^{21001233210133} is an apocalyptic number.

It is an amenable number.

21001233210133 is a deficient number, since it is larger than the sum of its proper divisors (1909997020427).

21001233210133 is a wasteful number, since it uses less digits than its factorization.

21001233210133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66166787.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21001233210133 its reverse (33101233210012), we get a palindrome (54102466420145).

The spelling of 21001233210133 in words is "twenty-one trillion, one billion, two hundred thirty-three million, two hundred ten thousand, one hundred thirty-three".