131011120231 has 4 divisors (see below), whose sum is σ = 131112601864. Its totient is φ = 130909638600.

The previous prime is 131011120193. The next prime is 131011120259. The reversal of 131011120231 is 132021110131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132021110131 = 149 ⋅886047719.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131011120231 is a prime.

It is a super-2 number, since 2×131011120231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131011120531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50738880 + ... + 50741461.

It is an arithmetic number, because the mean of its divisors is an integer number (32778150466).

Almost surely, 2^131011120231 is an apocalyptic number.

131011120231 is a deficient number, since it is larger than the sum of its proper divisors (101481633).

131011120231 is a wasteful number, since it uses less digits than its factorization.

131011120231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101481632.

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

Adding to 131011120231 its reverse (132021110131), we get a palindrome (263032230362).

The spelling of 131011120231 in words is "one hundred thirty-one billion, eleven million, one hundred twenty thousand, two hundred thirty-one".