1212313243403 has 4 divisors (see below), whose sum is σ = 1212843334560. Its totient is φ = 1211783152248.

The previous prime is 1212313243387. The next prime is 1212313243409. The reversal of 1212313243403 is 3043423132121.

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

It is a cyclic number.

It is not a de Polignac number, because 1212313243403 - 2⁴ = 1212313243387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212313243409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265042148 + ... + 265046721.

It is an arithmetic number, because the mean of its divisors is an integer number (303210833640).

Almost surely, 2^{1212313243403} is an apocalyptic number.

1212313243403 is a deficient number, since it is larger than the sum of its proper divisors (530091157).

1212313243403 is an equidigital number, since it uses as much as digits as its factorization.

1212313243403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530091156.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 1212313243403 its reverse (3043423132121), we get a palindrome (4255736375524).

The spelling of 1212313243403 in words is "one trillion, two hundred twelve billion, three hundred thirteen million, two hundred forty-three thousand, four hundred three".