21233102221 has 16 divisors (see below), whose sum is σ = 22670299008. Its totient is φ = 19817280000.

The previous prime is 21233102213. The next prime is 21233102237. The reversal of 21233102221 is 12220133212.

It is a cyclic number.

It is not a de Polignac number, because 21233102221 - 2³ = 21233102213 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 (21233102291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1535886 + ... + 1549648.

It is an arithmetic number, because the mean of its divisors is an integer number (1416893688).

Almost surely, 2^21233102221 is an apocalyptic number.

It is an amenable number.

21233102221 is a deficient number, since it is larger than the sum of its proper divisors (1437196787).

21233102221 is a wasteful number, since it uses less digits than its factorization.

21233102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14532.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21233102221 its reverse (12220133212), we get a palindrome (33453235433).

The spelling of 21233102221 in words is "twenty-one billion, two hundred thirty-three million, one hundred two thousand, two hundred twenty-one".