131201101231 has 4 divisors (see below), whose sum is σ = 131204695912. Its totient is φ = 131197506552.

The previous prime is 131201101211. The next prime is 131201101247. The reversal of 131201101231 is 132101102131.

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: 132101102131 = 8219 ⋅16072649.

It is a cyclic number.

It is not a de Polignac number, because 131201101231 - 2¹³ = 131201093039 is a prime.

It is a super-2 number, since 2×131201101231² (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 (131201101211) 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, 1742025 + ... + 1815778.

It is an arithmetic number, because the mean of its divisors is an integer number (32801173978).

Almost surely, 2^131201101231 is an apocalyptic number.

131201101231 is a deficient number, since it is larger than the sum of its proper divisors (3594681).

131201101231 is an equidigital number, since it uses as much as digits as its factorization.

131201101231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3594680.

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

Adding to 131201101231 its reverse (132101102131), we get a palindrome (263302203362).

The spelling of 131201101231 in words is "one hundred thirty-one billion, two hundred one million, one hundred one thousand, two hundred thirty-one".