131211111131 has 8 divisors (see below), whose sum is σ = 133391846400. Its totient is φ = 129036916008.

The previous prime is 131211111079. The next prime is 131211111151. The reversal of 131211111131 is 131111112131.

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 a de Polignac number, because none of the positive numbers 2^k-131211111131 is a prime.

It is a super-2 number, since 2×131211111131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131211111151) 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, 1594571 + ... + 1674836.

It is an arithmetic number, because the mean of its divisors is an integer number (16673980800).

Almost surely, 2^131211111131 is an apocalyptic number.

131211111131 is a deficient number, since it is larger than the sum of its proper divisors (2180735269).

131211111131 is an equidigital number, since it uses as much as digits as its factorization.

131211111131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3270073.

The product of its digits is 18, while the sum is 17.

Adding to 131211111131 its reverse (131111112131), we get a palindrome (262322223262).

The spelling of 131211111131 in words is "one hundred thirty-one billion, two hundred eleven million, one hundred eleven thousand, one hundred thirty-one".