210323303221 has 4 divisors (see below), whose sum is σ = 222695262252. Its totient is φ = 197951344192.

The previous prime is 210323303167. The next prime is 210323303227. The reversal of 210323303221 is 122303323012.

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 189003215025 + 21320088196 = 434745^2 + 146014^2 .

It is a cyclic number.

It is not a de Polignac number, because 210323303221 - 2¹³ = 210323295029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210323303192 and 210323303201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210323303227) 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, 6185979490 + ... + 6185979523.

It is an arithmetic number, because the mean of its divisors is an integer number (55673815563).

Almost surely, 2^210323303221 is an apocalyptic number.

It is an amenable number.

210323303221 is a deficient number, since it is larger than the sum of its proper divisors (12371959031).

210323303221 is a wasteful number, since it uses less digits than its factorization.

210323303221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12371959030.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 210323303221 its reverse (122303323012), we get a palindrome (332626626233).

The spelling of 210323303221 in words is "two hundred ten billion, three hundred twenty-three million, three hundred three thousand, two hundred twenty-one".