21010333221133 has 4 divisors (see below), whose sum is σ = 21011232236128. Its totient is φ = 21009434206140.

The previous prime is 21010333221079. The next prime is 21010333221161. The reversal of 21010333221133 is 33112233301012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21010333221133 - 2⁹ = 21010333220621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21010333221098 and 21010333221107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010333221173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 449472441 + ... + 449519182.

It is an arithmetic number, because the mean of its divisors is an integer number (5252808059032).

Almost surely, 2^{21010333221133} is an apocalyptic number.

It is an amenable number.

21010333221133 is a deficient number, since it is larger than the sum of its proper divisors (899014995).

21010333221133 is an equidigital number, since it uses as much as digits as its factorization.

21010333221133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899014994.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 21010333221133 its reverse (33112233301012), we get a palindrome (54122566522145).

The spelling of 21010333221133 in words is "twenty-one trillion, ten billion, three hundred thirty-three million, two hundred twenty-one thousand, one hundred thirty-three".