1321240031105 has 8 divisors (see below), whose sum is σ = 1586087028672. Its totient is φ = 1056592697328.

The previous prime is 1321240031087. The next prime is 1321240031107. The reversal of 1321240031105 is 5011300421231.

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

It is a cyclic number.

It is not a de Polignac number, because 1321240031105 - 2²⁰ = 1321238982529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321240031107) 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, 49901387 + ... + 49927856.

It is an arithmetic number, because the mean of its divisors is an integer number (198260878584).

Almost surely, 2^{1321240031105} is an apocalyptic number.

It is an amenable number.

1321240031105 is a deficient number, since it is larger than the sum of its proper divisors (264846997567).

1321240031105 is an equidigital number, since it uses as much as digits as its factorization.

1321240031105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99831895.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 1321240031105 its reverse (5011300421231), we get a palindrome (6332540452336).

The spelling of 1321240031105 in words is "one trillion, three hundred twenty-one billion, two hundred forty million, thirty-one thousand, one hundred five".