20131331232111 has 32 divisors (see below), whose sum is σ = 30231517870080. Its totient is φ = 11805278121600.

The previous prime is 20131331232107. The next prime is 20131331232143. The reversal of 20131331232111 is 11123213313102.

It is not a de Polignac number, because 20131331232111 - 2² = 20131331232107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20131331232191) 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 31 ways as a sum of consecutive naturals, for example, 4566685 + ... + 7817753.

It is an arithmetic number, because the mean of its divisors is an integer number (944734933440).

Almost surely, 2^{20131331232111} is an apocalyptic number.

20131331232111 is a deficient number, since it is larger than the sum of its proper divisors (10100186637969).

20131331232111 is a wasteful number, since it uses less digits than its factorization.

20131331232111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3257167.

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 20131331232111 its reverse (11123213313102), we get a palindrome (31254544545213).

The spelling of 20131331232111 in words is "twenty trillion, one hundred thirty-one billion, three hundred thirty-one million, two hundred thirty-two thousand, one hundred eleven".