21230213233 has 8 divisors (see below), whose sum is σ = 21786408000. Its totient is φ = 20679782448.

The previous prime is 21230213201. The next prime is 21230213243. The reversal of 21230213233 is 33231203212.

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 21230213233 - 2⁵ = 21230213201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21230213243) 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, 1433533 + ... + 1448266.

It is an arithmetic number, because the mean of its divisors is an integer number (2723301000).

Almost surely, 2^21230213233 is an apocalyptic number.

It is an amenable number.

21230213233 is a deficient number, since it is larger than the sum of its proper divisors (556194767).

21230213233 is a wasteful number, since it uses less digits than its factorization.

21230213233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2881991.

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

Adding to 21230213233 its reverse (33231203212), we get a palindrome (54461416445).

The spelling of 21230213233 in words is "twenty-one billion, two hundred thirty million, two hundred thirteen thousand, two hundred thirty-three".