21123234333 has 6 divisors (see below), whose sum is σ = 30511338494. Its totient is φ = 14082156216.

The previous prime is 21123234313. The next prime is 21123234343. The reversal of 21123234333 is 33343232112.

21123234333 is a `hidden beast` number, since 2 + 1 + 1 + 2 + 323 + 4 + 333 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12162340089 + 8960894244 = 110283^2 + 94662^2 .

It is not a de Polignac number, because 21123234333 - 2¹² = 21123230237 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21123234297 and 21123234306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21123234313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1173513010 + ... + 1173513027.

Almost surely, 2^21123234333 is an apocalyptic number.

It is an amenable number.

21123234333 is a deficient number, since it is larger than the sum of its proper divisors (9388104161).

21123234333 is a wasteful number, since it uses less digits than its factorization.

21123234333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2347026043 (or 2347026040 counting only the distinct ones).

The product of its digits is 7776, while the sum is 27.

Adding to 21123234333 its reverse (33343232112), we get a palindrome (54466466445).

The spelling of 21123234333 in words is "twenty-one billion, one hundred twenty-three million, two hundred thirty-four thousand, three hundred thirty-three".