210223232221 has 4 divisors (see below), whose sum is σ = 212585291100. Its totient is φ = 207861173344.

The previous prime is 210223232201. The next prime is 210223232243. The reversal of 210223232221 is 122232322012.

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

It can be written as a sum of positive squares in 2 ways, for example, as 102793336996 + 107429895225 = 320614^2 + 327765^2 .

It is a cyclic number.

It is not a de Polignac number, because 210223232221 - 2⁵ = 210223232189 is a prime.

It is a super-3 number, since 3×210223232221³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210223232192 and 210223232201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210223232201) 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, 1181029306 + ... + 1181029483.

It is an arithmetic number, because the mean of its divisors is an integer number (53146322775).

Almost surely, 2^210223232221 is an apocalyptic number.

It is an amenable number.

210223232221 is a deficient number, since it is larger than the sum of its proper divisors (2362058879).

210223232221 is an equidigital number, since it uses as much as digits as its factorization.

210223232221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2362058878.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 210223232221 its reverse (122232322012), we get a palindrome (332455554233).

The spelling of 210223232221 in words is "two hundred ten billion, two hundred twenty-three million, two hundred thirty-two thousand, two hundred twenty-one".