21230223133 has 8 divisors (see below), whose sum is σ = 24264257600. Its totient is φ = 18196475040.

The previous prime is 21230223121. The next prime is 21230223139. The reversal of 21230223133 is 33132203212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21230223133 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 (21230223139) 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, 122278 + ... + 239608.

It is an arithmetic number, because the mean of its divisors is an integer number (3033032200).

Almost surely, 2^21230223133 is an apocalyptic number.

It is an amenable number.

21230223133 is a deficient number, since it is larger than the sum of its proper divisors (3034034467).

21230223133 is a wasteful number, since it uses less digits than its factorization.

21230223133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143187.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21230223133 its reverse (33132203212), we get a palindrome (54362426345).

The spelling of 21230223133 in words is "twenty-one billion, two hundred thirty million, two hundred twenty-three thousand, one hundred thirty-three".