131021301110243 has 4 divisors (see below), whose sum is σ = 136717879419408. Its totient is φ = 125324722801080.

The previous prime is 131021301110221. The next prime is 131021301110269. The reversal of 131021301110243 is 342011103120131.

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

It is a cyclic number.

It is not a de Polignac number, because 131021301110243 - 2¹⁰ = 131021301109219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 5696578309141 = 131021301110243 / (1 + 3 + 1 + 0 + 2 + 1 + 3 + 0 + 1 + 1 + 1 + 0 + 2 + 4 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131021301190243) 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, 2848289154548 + ... + 2848289154593.

It is an arithmetic number, because the mean of its divisors is an integer number (34179469854852).

Almost surely, 2^{131021301110243} is an apocalyptic number.

131021301110243 is a deficient number, since it is larger than the sum of its proper divisors (5696578309165).

131021301110243 is an equidigital number, since it uses as much as digits as its factorization.

131021301110243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5696578309164.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 131021301110243 its reverse (342011103120131), we get a palindrome (473032404230374).

The spelling of 131021301110243 in words is "one hundred thirty-one trillion, twenty-one billion, three hundred one million, one hundred ten thousand, two hundred forty-three".