131201323231 has 8 divisors (see below), whose sum is σ = 145144614528. Its totient is φ = 117594015000.

The previous prime is 131201323229. The next prime is 131201323259. The reversal of 131201323231 is 132323102131.

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

It is not a de Polignac number, because 131201323231 - 2¹ = 131201323229 is a prime.

It is a super-2 number, since 2×131201323231² (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 (131201320231) 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, 83994945 + ... + 83996506.

It is an arithmetic number, because the mean of its divisors is an integer number (18143076816).

Almost surely, 2^131201323231 is an apocalyptic number.

131201323231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

131201323231 is a deficient number, since it is larger than the sum of its proper divisors (13943291297).

131201323231 is a wasteful number, since it uses less digits than its factorization.

131201323231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167991533.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 131201323231 its reverse (132323102131), we get a palindrome (263524425362).

The spelling of 131201323231 in words is "one hundred thirty-one billion, two hundred one million, three hundred twenty-three thousand, two hundred thirty-one".