203403134321311 has 4 divisors (see below), whose sum is σ = 203469454224712. Its totient is φ = 203336814417912.

The previous prime is 203403134321293. The next prime is 203403134321327. The reversal of 203403134321311 is 113123431304302.

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 203403134321311 - 2⁷ = 203403134321183 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 (203403134321411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33159947100 + ... + 33159953233.

It is an arithmetic number, because the mean of its divisors is an integer number (50867363556178).

Almost surely, 2^{203403134321311} is an apocalyptic number.

203403134321311 is a deficient number, since it is larger than the sum of its proper divisors (66319903401).

203403134321311 is an equidigital number, since it uses as much as digits as its factorization.

203403134321311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66319903400.

The product of its (nonzero) digits is 15552, while the sum is 31.

Adding to 203403134321311 its reverse (113123431304302), we get a palindrome (316526565625613).

The spelling of 203403134321311 in words is "two hundred three trillion, four hundred three billion, one hundred thirty-four million, three hundred twenty-one thousand, three hundred eleven".