203421331213 has 2 divisors, whose sum is σ = 203421331214. Its totient is φ = 203421331212.

The previous prime is 203421331199. The next prime is 203421331231. The reversal of 203421331213 is 312133124302.

Together with next prime (203421331231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196083352969 + 7337978244 = 442813^2 + 85662^2 .

It is a cyclic number.

It is not a de Polignac number, because 203421331213 - 2²¹ = 203419234061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203421331273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101710665606 + 101710665607.

It is an arithmetic number, because the mean of its divisors is an integer number (101710665607).

Almost surely, 2^203421331213 is an apocalyptic number.

It is an amenable number.

203421331213 is a deficient number, since it is larger than the sum of its proper divisors (1).

203421331213 is an equidigital number, since it uses as much as digits as its factorization.

203421331213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 203421331213 its reverse (312133124302), we get a palindrome (515554455515).

The spelling of 203421331213 in words is "two hundred three billion, four hundred twenty-one million, three hundred thirty-one thousand, two hundred thirteen".