131001021231123 has 4 divisors (see below), whose sum is σ = 174668028308168. Its totient is φ = 87334014154080.

The previous prime is 131001021231079. The next prime is 131001021231131. The reversal of 131001021231123 is 321132120100131.

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

It is not a de Polignac number, because 131001021231123 - 2²⁸ = 131000752795667 is a prime.

It is a super-2 number, since 2×131001021231123² (a number of 29 digits) contains 22 as substring.

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 131001021231123.

It is not an unprimeable number, because it can be changed into a prime (131001021231173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21833503538518 + ... + 21833503538523.

It is an arithmetic number, because the mean of its divisors is an integer number (43667007077042).

Almost surely, 2^{131001021231123} is an apocalyptic number.

131001021231123 is a deficient number, since it is larger than the sum of its proper divisors (43667007077045).

131001021231123 is an equidigital number, since it uses as much as digits as its factorization.

131001021231123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43667007077044.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 131001021231123 its reverse (321132120100131), we get a palindrome (452133141331254).

The spelling of 131001021231123 in words is "one hundred thirty-one trillion, one billion, twenty-one million, two hundred thirty-one thousand, one hundred twenty-three".