1312342343221 has 32 divisors (see below), whose sum is σ = 1680774278400. Its totient is φ = 1002531741120.

The previous prime is 1312342343197. The next prime is 1312342343237. The reversal of 1312342343221 is 1223432432131.

It is not a de Polignac number, because 1312342343221 - 2⁷ = 1312342343093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312346343221) 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 31 ways as a sum of consecutive naturals, for example, 1025275 + ... + 1917256.

It is an arithmetic number, because the mean of its divisors is an integer number (52524196200).

Almost surely, 2^{1312342343221} is an apocalyptic number.

It is an amenable number.

1312342343221 is a deficient number, since it is larger than the sum of its proper divisors (368431935179).

1312342343221 is an equidigital number, since it uses as much as digits as its factorization.

1312342343221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2942606 (or 2942580 counting only the distinct ones).

The product of its digits is 20736, while the sum is 31.

Adding to 1312342343221 its reverse (1223432432131), we get a palindrome (2535774775352).

The spelling of 1312342343221 in words is "one trillion, three hundred twelve billion, three hundred forty-two million, three hundred forty-three thousand, two hundred twenty-one".