131340120231 has 4 divisors (see below), whose sum is σ = 175120160312. Its totient is φ = 87560080152.

The previous prime is 131340120181. The next prime is 131340120269. The reversal of 131340120231 is 132021043131.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 131340120231 - 2¹⁹ = 131339595943 is a prime.

It is a super-2 number, since 2×131340120231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131340120198 and 131340120207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131340120031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21890020036 + ... + 21890020041.

It is an arithmetic number, because the mean of its divisors is an integer number (43780040078).

Almost surely, 2^131340120231 is an apocalyptic number.

131340120231 is a deficient number, since it is larger than the sum of its proper divisors (43780040081).

131340120231 is an equidigital number, since it uses as much as digits as its factorization.

131340120231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43780040080.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 131340120231 its reverse (132021043131), we get a palindrome (263361163362).

The spelling of 131340120231 in words is "one hundred thirty-one billion, three hundred forty million, one hundred twenty thousand, two hundred thirty-one".