210203213321 has 2 divisors, whose sum is σ = 210203213322. Its totient is φ = 210203213320.

The previous prime is 210203213309. The next prime is 210203213333. The reversal of 210203213321 is 123312302012.

It is a balanced prime because it is at equal distance from previous prime (210203213309) and next prime (210203213333).

It can be written as a sum of positive squares in only one way, i.e., 122608524025 + 87594689296 = 350155^2 + 295964^2 .

It is a cyclic number.

It is not a de Polignac number, because 210203213321 - 2¹⁴ = 210203196937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210203213293 and 210203213302.

It is not a weakly prime, because it can be changed into another prime (210203213221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105101606660 + 105101606661.

It is an arithmetic number, because the mean of its divisors is an integer number (105101606661).

Almost surely, 2^210203213321 is an apocalyptic number.

It is an amenable number.

210203213321 is a deficient number, since it is larger than the sum of its proper divisors (1).

210203213321 is an equidigital number, since it uses as much as digits as its factorization.

210203213321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 210203213321 its reverse (123312302012), we get a palindrome (333515515333).

The spelling of 210203213321 in words is "two hundred ten billion, two hundred three million, two hundred thirteen thousand, three hundred twenty-one".