12115121504 has 12 divisors (see below), whose sum is σ = 23851645524. Its totient is φ = 6057560736.

The previous prime is 12115121471. The next prime is 12115121507. The reversal of 12115121504 is 40512151121.

It is a happy number.

It is a super-3 number, since 3×12115121504³ (a number of 31 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12115121504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12115121507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189298742 + ... + 189298805.

It is an arithmetic number, because the mean of its divisors is an integer number (1987637127).

Almost surely, 2^12115121504 is an apocalyptic number.

It is an amenable number.

12115121504 is a deficient number, since it is larger than the sum of its proper divisors (11736524020).

12115121504 is an equidigital number, since it uses as much as digits as its factorization.

12115121504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378597557 (or 378597549 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 23.

Adding to 12115121504 its reverse (40512151121), we get a palindrome (52627272625).

The spelling of 12115121504 in words is "twelve billion, one hundred fifteen million, one hundred twenty-one thousand, five hundred four".