203031011211311 has 4 divisors (see below), whose sum is σ = 211858446481392. Its totient is φ = 194203575941232.

The previous prime is 203031011211269. The next prime is 203031011211349. The reversal of 203031011211311 is 113112110130302.

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 203031011211311 - 2¹⁴ = 203031011194927 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 (203031011211811) 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, 4413717635006 + ... + 4413717635051.

It is an arithmetic number, because the mean of its divisors is an integer number (52964611620348).

Almost surely, 2^{203031011211311} is an apocalyptic number.

203031011211311 is a deficient number, since it is larger than the sum of its proper divisors (8827435270081).

203031011211311 is an equidigital number, since it uses as much as digits as its factorization.

203031011211311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8827435270080.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 203031011211311 its reverse (113112110130302), we get a palindrome (316143121341613).

The spelling of 203031011211311 in words is "two hundred three trillion, thirty-one billion, eleven million, two hundred eleven thousand, three hundred eleven".