12121140224 has 22 divisors (see below), whose sum is σ = 24230445444. Its totient is φ = 6060569600.

The previous prime is 12121140221. The next prime is 12121140253. The reversal of 12121140224 is 42204112121.

It is a junction number, because it is equal to n+sod(n) for n = 12121140196 and 12121140205.

It is not an unprimeable number, because it can be changed into a prime (12121140221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5917502 + ... + 5919549.

Almost surely, 2^12121140224 is an apocalyptic number.

It is an amenable number.

12121140224 is a deficient number, since it is larger than the sum of its proper divisors (12109305220).

12121140224 is an equidigital number, since it uses as much as digits as its factorization.

12121140224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11837071 (or 11837053 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 12121140224 its reverse (42204112121), we get a palindrome (54325252345).

The spelling of 12121140224 in words is "twelve billion, one hundred twenty-one million, one hundred forty thousand, two hundred twenty-four".