12344155143421 has 2 divisors, whose sum is σ = 12344155143422. Its totient is φ = 12344155143420.

The previous prime is 12344155143413. The next prime is 12344155143427. The reversal of 12344155143421 is 12434155144321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8440250954521 + 3903904188900 = 2905211^2 + 1975830^2 .

It is a cyclic number.

It is not a de Polignac number, because 12344155143421 - 2³ = 12344155143413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12344155143427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6172077571710 + 6172077571711.

It is an arithmetic number, because the mean of its divisors is an integer number (6172077571711).

Almost surely, 2^{12344155143421} is an apocalyptic number.

It is an amenable number.

12344155143421 is a deficient number, since it is larger than the sum of its proper divisors (1).

12344155143421 is an equidigital number, since it uses as much as digits as its factorization.

12344155143421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 230400, while the sum is 40.

The spelling of 12344155143421 in words is "twelve trillion, three hundred forty-four billion, one hundred fifty-five million, one hundred forty-three thousand, four hundred twenty-one".