212321203 has 2 divisors, whose sum is σ = 212321204. Its totient is φ = 212321202.

The previous prime is 212321189. The next prime is 212321261. The reversal of 212321203 is 302123212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212321203 - 2¹⁷ = 212190131 is a prime.

It is not a weakly prime, because it can be changed into another prime (212321293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106160601 + 106160602.

It is an arithmetic number, because the mean of its divisors is an integer number (106160602).

Almost surely, 2^212321203 is an apocalyptic number.

212321203 is a deficient number, since it is larger than the sum of its proper divisors (1).

212321203 is an equidigital number, since it uses as much as digits as its factorization.

212321203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 212321203 is about 14571.2457600577. The cubic root of 212321203 is about 596.5741833431.

Adding to 212321203 its reverse (302123212), we get a palindrome (514444415).

The spelling of 212321203 in words is "two hundred twelve million, three hundred twenty-one thousand, two hundred three".