20131112131 has 8 divisors (see below), whose sum is σ = 21681116240. Its totient is φ = 18581316192.

The previous prime is 20131112117. The next prime is 20131112147. The reversal of 20131112131 is 13121113102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20131112131 - 2¹⁹ = 20130587843 is a prime.

It is a super-2 number, since 2×20131112131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20131112171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190816 + ... + 276898.

It is an arithmetic number, because the mean of its divisors is an integer number (2710139530).

Almost surely, 2^20131112131 is an apocalyptic number.

20131112131 is a deficient number, since it is larger than the sum of its proper divisors (1550004109).

20131112131 is a wasteful number, since it uses less digits than its factorization.

20131112131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104085.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 20131112131 its reverse (13121113102), we get a palindrome (33252225233).

The spelling of 20131112131 in words is "twenty billion, one hundred thirty-one million, one hundred twelve thousand, one hundred thirty-one".