21232120222223 has 4 divisors (see below), whose sum is σ = 21232383399048. Its totient is φ = 21231857045400.

The previous prime is 21232120222213. The next prime is 21232120222289. The reversal of 21232120222223 is 32222202123212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21232120222223 - 2¹⁰ = 21232120221199 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21232120222192 and 21232120222201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232120222213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131467361 + ... + 131628762.

It is an arithmetic number, because the mean of its divisors is an integer number (5308095849762).

Almost surely, 2^{21232120222223} is an apocalyptic number.

21232120222223 is a deficient number, since it is larger than the sum of its proper divisors (263176825).

21232120222223 is an equidigital number, since it uses as much as digits as its factorization.

21232120222223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263176824.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21232120222223 its reverse (32222202123212), we get a palindrome (53454322345435).

The spelling of 21232120222223 in words is "twenty-one trillion, two hundred thirty-two billion, one hundred twenty million, two hundred twenty-two thousand, two hundred twenty-three".