1244947324981 has 2 divisors, whose sum is σ = 1244947324982. Its totient is φ = 1244947324980.

The previous prime is 1244947324891. The next prime is 1244947325009. The reversal of 1244947324981 is 1894237494421.

Together with previous prime (1244947324891) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1244407180900 + 540144081 = 1115530^2 + 23241^2 .

It is a cyclic number.

It is not a de Polignac number, because 1244947324981 - 2³¹ = 1242799841333 is a prime.

It is a super-2 number, since 2×1244947324981² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1244947324081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622473662490 + 622473662491.

It is an arithmetic number, because the mean of its divisors is an integer number (622473662491).

Almost surely, 2^{1244947324981} is an apocalyptic number.

It is an amenable number.

1244947324981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244947324981 is an equidigital number, since it uses as much as digits as its factorization.

1244947324981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13934592, while the sum is 58.

The spelling of 1244947324981 in words is "one trillion, two hundred forty-four billion, nine hundred forty-seven million, three hundred twenty-four thousand, nine hundred eighty-one".