131231310000001 has 4 divisors (see below), whose sum is σ = 131232873608532. Its totient is φ = 131229746391472.

The previous prime is 131231309999917. The next prime is 131231310000071. The reversal of 131231310000001 is 100000013132131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 116938789502976 + 14292520497025 = 10813824^2 + 3780545^2 .

It is a cyclic number.

It is not a de Polignac number, because 131231310000001 - 2¹⁷ = 131231309868929 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131231310000001.

It is not an unprimeable number, because it can be changed into a prime (131231310000071) 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, 781678366 + ... + 781846231.

It is an arithmetic number, because the mean of its divisors is an integer number (32808218402133).

Almost surely, 2^{131231310000001} is an apocalyptic number.

It is an amenable number.

131231310000001 is a deficient number, since it is larger than the sum of its proper divisors (1563608531).

131231310000001 is an equidigital number, since it uses as much as digits as its factorization.

131231310000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1563608530.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 131231310000001 its reverse (100000013132131), we get a palindrome (231231323132132).

It can be divided in two parts, 1312 and 31310000001, that added together give a palindrome (31310001313).

The spelling of 131231310000001 in words is "one hundred thirty-one trillion, two hundred thirty-one billion, three hundred ten million, one", and thus it is an aban number.