210000203321 has 4 divisors (see below), whose sum is σ = 210276157044. Its totient is φ = 209724249600.

The previous prime is 210000203299. The next prime is 210000203323. The reversal of 210000203321 is 123302000012.

It is a happy number.

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 986650921 + 209013552400 = 31411^2 + 457180^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210000203321 is a prime.

It is a super-2 number, since 2×210000203321² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210000203296 and 210000203305.

It is not an unprimeable number, because it can be changed into a prime (210000203323) 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, 137975720 + ... + 137977241.

It is an arithmetic number, because the mean of its divisors is an integer number (52569039261).

Almost surely, 2^210000203321 is an apocalyptic number.

It is an amenable number.

210000203321 is a deficient number, since it is larger than the sum of its proper divisors (275953723).

210000203321 is an equidigital number, since it uses as much as digits as its factorization.

210000203321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275953722.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 210000203321 its reverse (123302000012), we get a palindrome (333302203333).

The spelling of 210000203321 in words is "two hundred ten billion, two hundred three thousand, three hundred twenty-one".