203301231311 has 4 divisors (see below), whose sum is σ = 207626789472. Its totient is φ = 198975673152.

The previous prime is 203301231307. The next prime is 203301231361. The reversal of 203301231311 is 113132103302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 203301231311 - 2² = 203301231307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203301231361) 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 in 3 ways as a sum of consecutive naturals, for example, 2162779010 + ... + 2162779103.

It is an arithmetic number, because the mean of its divisors is an integer number (51906697368).

Almost surely, 2^203301231311 is an apocalyptic number.

203301231311 is a deficient number, since it is larger than the sum of its proper divisors (4325558161).

203301231311 is an equidigital number, since it uses as much as digits as its factorization.

203301231311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4325558160.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 203301231311 its reverse (113132103302), we get a palindrome (316433334613).

The spelling of 203301231311 in words is "two hundred three billion, three hundred one million, two hundred thirty-one thousand, three hundred eleven".