201311312203 has 2 divisors, whose sum is σ = 201311312204. Its totient is φ = 201311312202.

The previous prime is 201311312131. The next prime is 201311312303. The reversal of 201311312203 is 302213113102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201311312203 - 2¹³ = 201311304011 is a prime.

It is not a weakly prime, because it can be changed into another prime (201311312303) 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, 100655656101 + 100655656102.

It is an arithmetic number, because the mean of its divisors is an integer number (100655656102).

Almost surely, 2^201311312203 is an apocalyptic number.

201311312203 is a deficient number, since it is larger than the sum of its proper divisors (1).

201311312203 is an equidigital number, since it uses as much as digits as its factorization.

201311312203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 201311312203 its reverse (302213113102), we get a palindrome (503524425305).

The spelling of 201311312203 in words is "two hundred one billion, three hundred eleven million, three hundred twelve thousand, two hundred three".