1171243500013 has 8 divisors (see below), whose sum is σ = 1211653510200. Its totient is φ = 1130834976768.

The previous prime is 1171243499989. The next prime is 1171243500029. The reversal of 1171243500013 is 3100053421711.

It can be written as a sum of positive squares in 4 ways, for example, as 75909617289 + 1095333882724 = 275517^2 + 1046582^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1171243500013 is a prime.

It is a super-2 number, since 2×1171243500013² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1171243500613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1369045 + ... + 2053477.

It is an arithmetic number, because the mean of its divisors is an integer number (151456688775).

Almost surely, 2^{1171243500013} is an apocalyptic number.

It is an amenable number.

1171243500013 is a deficient number, since it is larger than the sum of its proper divisors (40410010187).

1171243500013 is an equidigital number, since it uses as much as digits as its factorization.

1171243500013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743471.

The product of its (nonzero) digits is 2520, while the sum is 28.

Adding to 1171243500013 its reverse (3100053421711), we get a palindrome (4271296921724).

The spelling of 1171243500013 in words is "one trillion, one hundred seventy-one billion, two hundred forty-three million, five hundred thousand, thirteen".