21230231133 has 8 divisors (see below), whose sum is σ = 28307654496. Its totient is φ = 14153147600.

The previous prime is 21230231119. The next prime is 21230231161. The reversal of 21230231133 is 33113203212.

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 21230231133 - 2¹³ = 21230222941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230231833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170863 + ... + 267683.

It is an arithmetic number, because the mean of its divisors is an integer number (3538456812).

Almost surely, 2^21230231133 is an apocalyptic number.

It is an amenable number.

21230231133 is a deficient number, since it is larger than the sum of its proper divisors (7077423363).

21230231133 is an equidigital number, since it uses as much as digits as its factorization.

21230231133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169915.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21230231133 its reverse (33113203212), we get a palindrome (54343434345).

The spelling of 21230231133 in words is "twenty-one billion, two hundred thirty million, two hundred thirty-one thousand, one hundred thirty-three".