1313621240105 has 4 divisors (see below), whose sum is σ = 1576345488132. Its totient is φ = 1050896992080.

The previous prime is 1313621240059. The next prime is 1313621240111. The reversal of 1313621240105 is 5010421263131.

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 368162551696 + 945458688409 = 606764^2 + 972347^2 .

It is not a de Polignac number, because 1313621240105 - 2⁸ = 1313621239849 is a prime.

It is a super-2 number, since 2×1313621240105² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131362124006 + ... + 131362124015.

It is an arithmetic number, because the mean of its divisors is an integer number (394086372033).

Almost surely, 2^{1313621240105} is an apocalyptic number.

It is an amenable number.

1313621240105 is a deficient number, since it is larger than the sum of its proper divisors (262724248027).

1313621240105 is an equidigital number, since it uses as much as digits as its factorization.

1313621240105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262724248026.

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 1313621240105 in words is "one trillion, three hundred thirteen billion, six hundred twenty-one million, two hundred forty thousand, one hundred five".