201311231032031 has 4 divisors (see below), whose sum is σ = 201508788669000. Its totient is φ = 201113673395064.

The previous prime is 201311231032013. The next prime is 201311231032127. The reversal of 201311231032031 is 130230132113102.

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 201311231032031 - 2¹⁴ = 201311231015647 is a prime.

It is a super-2 number, since 2×201311231032031² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201311231031988 and 201311231032006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201311231032001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98778816956 + ... + 98778818993.

It is an arithmetic number, because the mean of its divisors is an integer number (50377197167250).

Almost surely, 2^{201311231032031} is an apocalyptic number.

201311231032031 is a deficient number, since it is larger than the sum of its proper divisors (197557636969).

201311231032031 is a wasteful number, since it uses less digits than its factorization.

201311231032031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197557636968.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 201311231032031 its reverse (130230132113102), we get a palindrome (331541363145133).

The spelling of 201311231032031 in words is "two hundred one trillion, three hundred eleven billion, two hundred thirty-one million, thirty-two thousand, thirty-one".