12121140043 has 4 divisors (see below), whose sum is σ = 12121361608. Its totient is φ = 12120918480.

The previous prime is 12121139957. The next prime is 12121140137. The reversal of 12121140043 is 34004112121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12121140043 - 2¹⁷ = 12121008971 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12121140043.

It is not an unprimeable number, because it can be changed into a prime (12121140443) 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, 36928 + ... + 160018.

It is an arithmetic number, because the mean of its divisors is an integer number (3030340402).

Almost surely, 2^12121140043 is an apocalyptic number.

12121140043 is a deficient number, since it is larger than the sum of its proper divisors (221565).

12121140043 is an equidigital number, since it uses as much as digits as its factorization.

12121140043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221564.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 12121140043 its reverse (34004112121), we get a palindrome (46125252164).

The spelling of 12121140043 in words is "twelve billion, one hundred twenty-one million, one hundred forty thousand, forty-three".