21233213123211 has 24 divisors (see below), whose sum is σ = 30986805071040. Its totient is φ = 14009352454656.

The previous prime is 21233213123197. The next prime is 21233213123263. The reversal of 21233213123211 is 11232131233212.

21233213123211 is a `hidden beast` number, since 2 + 1 + 2 + 3 + 3 + 21 + 312 + 321 + 1 = 666.

It is not a de Polignac number, because 21233213123211 - 2⁵ = 21233213123179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21233213123011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96673705 + ... + 96893093.

It is an arithmetic number, because the mean of its divisors is an integer number (1291116877960).

Almost surely, 2^{21233213123211} is an apocalyptic number.

21233213123211 is a deficient number, since it is larger than the sum of its proper divisors (9753591947829).

21233213123211 is a wasteful number, since it uses less digits than its factorization.

21233213123211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330355 (or 330352 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

Adding to 21233213123211 its reverse (11232131233212), we get a palindrome (32465344356423).

The spelling of 21233213123211 in words is "twenty-one trillion, two hundred thirty-three billion, two hundred thirteen million, one hundred twenty-three thousand, two hundred eleven".