1212543431043 has 96 divisors (see below), whose sum is σ = 2035599102720. Its totient is φ = 637734666240.

The previous prime is 1212543431039. The next prime is 1212543431059. The reversal of 1212543431043 is 3401343452121.

It is not a de Polignac number, because 1212543431043 - 2² = 1212543431039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1212543430995 and 1212543431013.

It is not an unprimeable number, because it can be changed into a prime (1212543431443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 28434808 + ... + 28477418.

It is an arithmetic number, because the mean of its divisors is an integer number (21204157320).

Almost surely, 2^{1212543431043} is an apocalyptic number.

1212543431043 is a deficient number, since it is larger than the sum of its proper divisors (823055671677).

1212543431043 is a wasteful number, since it uses less digits than its factorization.

1212543431043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42897 (or 42890 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 1212543431043 its reverse (3401343452121), we get a palindrome (4613886883164).

The spelling of 1212543431043 in words is "one trillion, two hundred twelve billion, five hundred forty-three million, four hundred thirty-one thousand, forty-three".