21221132313223 has 8 divisors (see below), whose sum is σ = 21835605606336. Its totient is φ = 20614587708000.

The previous prime is 21221132313211. The next prime is 21221132313259. The reversal of 21221132313223 is 32231323112212.

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 21221132313223 - 2⁵ = 21221132313191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21221132313191 and 21221132313200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21221132313263) 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, 1982166543 + ... + 1982177248.

It is an arithmetic number, because the mean of its divisors is an integer number (2729450700792).

Almost surely, 2^{21221132313223} is an apocalyptic number.

21221132313223 is a deficient number, since it is larger than the sum of its proper divisors (614473293113).

21221132313223 is a wasteful number, since it uses less digits than its factorization.

21221132313223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3964343945.

The product of its digits is 5184, while the sum is 28.

Adding to 21221132313223 its reverse (32231323112212), we get a palindrome (53452455425435).

The spelling of 21221132313223 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred thirty-two million, three hundred thirteen thousand, two hundred twenty-three".