1212431313043 has 4 divisors (see below), whose sum is σ = 1214409178768. Its totient is φ = 1210453447320.

The previous prime is 1212431313029. The next prime is 1212431313047. The reversal of 1212431313043 is 3403131342121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212431313043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212431313047) 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 3 ways as a sum of consecutive naturals, for example, 988931943 + ... + 988933168.

It is an arithmetic number, because the mean of its divisors is an integer number (303602294692).

Almost surely, 2^{1212431313043} is an apocalyptic number.

1212431313043 is a deficient number, since it is larger than the sum of its proper divisors (1977865725).

1212431313043 is an equidigital number, since it uses as much as digits as its factorization.

1212431313043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1977865724.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 1212431313043 its reverse (3403131342121), we get a palindrome (4615562655164).

The spelling of 1212431313043 in words is "one trillion, two hundred twelve billion, four hundred thirty-one million, three hundred thirteen thousand, forty-three".