12401243213 has 4 divisors (see below), whose sum is σ = 12635228988. Its totient is φ = 12167257440.

The previous prime is 12401243207. The next prime is 12401243221. The reversal of 12401243213 is 31234210421.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7220410729 + 5180832484 = 84973^2 + 71978^2 .

It is a cyclic number.

It is not a de Polignac number, because 12401243213 - 2⁶ = 12401243149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12401243243) 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, 116992808 + ... + 116992913.

It is an arithmetic number, because the mean of its divisors is an integer number (3158807247).

Almost surely, 2^12401243213 is an apocalyptic number.

It is an amenable number.

12401243213 is a deficient number, since it is larger than the sum of its proper divisors (233985775).

12401243213 is an equidigital number, since it uses as much as digits as its factorization.

12401243213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233985774.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 12401243213 its reverse (31234210421), we get a palindrome (43635453634).

The spelling of 12401243213 in words is "twelve billion, four hundred one million, two hundred forty-three thousand, two hundred thirteen".