20131011231 has 8 divisors (see below), whose sum is σ = 26945790384. Its totient is φ = 13368453120.

The previous prime is 20131011209. The next prime is 20131011269. The reversal of 20131011231 is 13211013102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20131011231 - 2¹⁴ = 20130994847 is a prime.

It is a super-2 number, since 2×20131011231² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20131011231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20131011031) 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 7 ways as a sum of consecutive naturals, for example, 13054360 + ... + 13055901.

It is an arithmetic number, because the mean of its divisors is an integer number (3368223798).

Almost surely, 2^20131011231 is an apocalyptic number.

20131011231 is a deficient number, since it is larger than the sum of its proper divisors (6814779153).

20131011231 is a wasteful number, since it uses less digits than its factorization.

20131011231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26110521.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 20131011231 its reverse (13211013102), we get a palindrome (33342024333).

The spelling of 20131011231 in words is "twenty billion, one hundred thirty-one million, eleven thousand, two hundred thirty-one".