12115021444 has 12 divisors (see below), whose sum is σ = 21774295564. Its totient is φ = 5893794144.

The previous prime is 12115021441. The next prime is 12115021447. The reversal of 12115021444 is 44412051121.

It is an interprime number because it is at equal distance from previous prime (12115021441) and next prime (12115021447).

It can be written as a sum of positive squares in 2 ways, for example, as 11635936900 + 479084544 = 107870^2 + 21888^2 .

It is not an unprimeable number, because it can be changed into a prime (12115021441) 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, 40928979 + ... + 40929274.

Almost surely, 2^12115021444 is an apocalyptic number.

It is an amenable number.

12115021444 is a deficient number, since it is larger than the sum of its proper divisors (9659274120).

12115021444 is a wasteful number, since it uses less digits than its factorization.

12115021444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81858294 (or 81858292 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

Adding to 12115021444 its reverse (44412051121), we get a palindrome (56527072565).

The spelling of 12115021444 in words is "twelve billion, one hundred fifteen million, twenty-one thousand, four hundred forty-four".