21301331133 has 4 divisors (see below), whose sum is σ = 28401774848. Its totient is φ = 14200887420.

The previous prime is 21301331057. The next prime is 21301331141. The reversal of 21301331133 is 33113310312.

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 not a de Polignac number, because 21301331133 - 2⁸ = 21301330877 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 (21301331173) 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, 3550221853 + ... + 3550221858.

It is an arithmetic number, because the mean of its divisors is an integer number (7100443712).

Almost surely, 2^21301331133 is an apocalyptic number.

It is an amenable number.

21301331133 is a deficient number, since it is larger than the sum of its proper divisors (7100443715).

21301331133 is an equidigital number, since it uses as much as digits as its factorization.

21301331133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7100443714.

The product of its (nonzero) digits is 486, while the sum is 21.

Adding to 21301331133 its reverse (33113310312), we get a palindrome (54414641445).

The spelling of 21301331133 in words is "twenty-one billion, three hundred one million, three hundred thirty-one thousand, one hundred thirty-three".