12115251121 has 4 divisors (see below), whose sum is σ = 12121075044. Its totient is φ = 12109427200.

The previous prime is 12115251119. The next prime is 12115251131.

It is a happy number.

12115251121 is nontrivially palindromic in base 10.

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 2456292721 + 9658958400 = 49561^2 + 98280^2 .

It is a cyclic number.

It is not a de Polignac number, because 12115251121 - 2¹ = 12115251119 is a prime.

It is a super-3 number, since 3×12115251121³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12115251092 and 12115251101.

It is not an unprimeable number, because it can be changed into a prime (12115251131) 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, 2908840 + ... + 2913001.

It is an arithmetic number, because the mean of its divisors is an integer number (3030268761).

Almost surely, 2^12115251121 is an apocalyptic number.

It is an amenable number.

12115251121 is a deficient number, since it is larger than the sum of its proper divisors (5823923).

12115251121 is an equidigital number, since it uses as much as digits as its factorization.

12115251121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5823922.

The product of its digits is 200, while the sum is 22.

The spelling of 12115251121 in words is "twelve billion, one hundred fifteen million, two hundred fifty-one thousand, one hundred twenty-one".