11515000143121 has 8 divisors (see below), whose sum is σ = 11522899344488. Its totient is φ = 11507102784000.

The previous prime is 11515000143041. The next prime is 11515000143133. The reversal of 11515000143121 is 12134100051511.

It can be written as a sum of positive squares in 4 ways, for example, as 857151930625 + 10657848212496 = 925825^2 + 3264636^2 .

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 11515000143121 - 2⁷ = 11515000142993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11515000143221) 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 7 ways as a sum of consecutive naturals, for example, 12163201 + ... + 13075681.

It is an arithmetic number, because the mean of its divisors is an integer number (1440362418061).

Almost surely, 2^{11515000143121} is an apocalyptic number.

It is an amenable number.

11515000143121 is a deficient number, since it is larger than the sum of its proper divisors (7899201367).

11515000143121 is an equidigital number, since it uses as much as digits as its factorization.

11515000143121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921123.

The product of its (nonzero) digits is 600, while the sum is 25.

Adding to 11515000143121 its reverse (12134100051511), we get a palindrome (23649100194632).

The spelling of 11515000143121 in words is "eleven trillion, five hundred fifteen billion, one hundred forty-three thousand, one hundred twenty-one".