1244021323871 has 2 divisors, whose sum is σ = 1244021323872. Its totient is φ = 1244021323870.

The previous prime is 1244021323859. The next prime is 1244021323877. The reversal of 1244021323871 is 1783231204421.

It is a strong prime.

It is an emirp because it is prime and its reverse (1783231204421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1244021323871 - 2³⁰ = 1242947582047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1244021323877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622010661935 + 622010661936.

It is an arithmetic number, because the mean of its divisors is an integer number (622010661936).

Almost surely, 2^{1244021323871} is an apocalyptic number.

1244021323871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244021323871 is an equidigital number, since it uses as much as digits as its factorization.

1244021323871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 38.

The spelling of 1244021323871 in words is "one trillion, two hundred forty-four billion, twenty-one million, three hundred twenty-three thousand, eight hundred seventy-one".