1243221434113 has 4 divisors (see below), whose sum is σ = 1297274539968. Its totient is φ = 1189168328260.

The previous prime is 1243221434093. The next prime is 1243221434167. The reversal of 1243221434113 is 3114341223421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1243221434113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243221431113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27026552893 + ... + 27026552938.

It is an arithmetic number, because the mean of its divisors is an integer number (324318634992).

Almost surely, 2^{1243221434113} is an apocalyptic number.

It is an amenable number.

1243221434113 is a deficient number, since it is larger than the sum of its proper divisors (54053105855).

1243221434113 is an equidigital number, since it uses as much as digits as its factorization.

1243221434113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54053105854.

The product of its digits is 13824, while the sum is 31.

Adding to 1243221434113 its reverse (3114341223421), we get a palindrome (4357562657534).

The spelling of 1243221434113 in words is "one trillion, two hundred forty-three billion, two hundred twenty-one million, four hundred thirty-four thousand, one hundred thirteen".