21230101233 has 12 divisors (see below), whose sum is σ = 33453493008. Its totient is φ = 12866727960.

The previous prime is 21230101159. The next prime is 21230101241. The reversal of 21230101233 is 33210103212.

It is not a de Polignac number, because 21230101233 - 2¹⁷ = 21229970161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21230101273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107222635 + ... + 107222832.

It is an arithmetic number, because the mean of its divisors is an integer number (2787791084).

Almost surely, 2^21230101233 is an apocalyptic number.

It is an amenable number.

21230101233 is a deficient number, since it is larger than the sum of its proper divisors (12223391775).

21230101233 is a wasteful number, since it uses less digits than its factorization.

21230101233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214445484 (or 214445481 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21230101233 its reverse (33210103212), we get a palindrome (54440204445).

The spelling of 21230101233 in words is "twenty-one billion, two hundred thirty million, one hundred one thousand, two hundred thirty-three".