1212315121343 has 4 divisors (see below), whose sum is σ = 1212321195960. Its totient is φ = 1212309046728.

The previous prime is 1212315121333. The next prime is 1212315121357. The reversal of 1212315121343 is 3431215132121.

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 1212315121343 - 2⁴ = 1212315121327 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 (1212315121333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2727413 + ... + 3140606.

It is an arithmetic number, because the mean of its divisors is an integer number (303080298990).

Almost surely, 2^{1212315121343} is an apocalyptic number.

1212315121343 is a deficient number, since it is larger than the sum of its proper divisors (6074617).

1212315121343 is an equidigital number, since it uses as much as digits as its factorization.

1212315121343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6074616.

The product of its digits is 4320, while the sum is 29.

The spelling of 1212315121343 in words is "one trillion, two hundred twelve billion, three hundred fifteen million, one hundred twenty-one thousand, three hundred forty-three".