12440121143 has 2 divisors, whose sum is σ = 12440121144. Its totient is φ = 12440121142.

The previous prime is 12440121139. The next prime is 12440121173. The reversal of 12440121143 is 34112104421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12440121143 - 2² = 12440121139 is a prime.

It is a super-2 number, since 2×12440121143² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12440121103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6220060571 + 6220060572.

It is an arithmetic number, because the mean of its divisors is an integer number (6220060572).

Almost surely, 2^12440121143 is an apocalyptic number.

12440121143 is a deficient number, since it is larger than the sum of its proper divisors (1).

12440121143 is an equidigital number, since it uses as much as digits as its factorization.

12440121143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 12440121143 its reverse (34112104421), we get a palindrome (46552225564).

The spelling of 12440121143 in words is "twelve billion, four hundred forty million, one hundred twenty-one thousand, one hundred forty-three".