1344321043721 has 2 divisors, whose sum is σ = 1344321043722. Its totient is φ = 1344321043720.

The previous prime is 1344321043693. The next prime is 1344321043739. The reversal of 1344321043721 is 1273401234431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1330966005625 + 13355038096 = 1153675^2 + 115564^2 .

It is an emirp because it is prime and its reverse (1273401234431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1344321043721 - 2¹⁸ = 1344320781577 is a prime.

It is a super-2 number, since 2×1344321043721² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1344321043321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672160521860 + 672160521861.

It is an arithmetic number, because the mean of its divisors is an integer number (672160521861).

Almost surely, 2^{1344321043721} is an apocalyptic number.

It is an amenable number.

1344321043721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1344321043721 is an equidigital number, since it uses as much as digits as its factorization.

1344321043721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 35.

The spelling of 1344321043721 in words is "one trillion, three hundred forty-four billion, three hundred twenty-one million, forty-three thousand, seven hundred twenty-one".