244111399981 has 2 divisors, whose sum is σ = 244111399982. Its totient is φ = 244111399980.

The previous prime is 244111399979. The next prime is 244111400033. The reversal of 244111399981 is 189993111442.

It is a happy number.

244111399981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (244111400033) can be obtained adding 244111399981 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201286822500 + 42824577481 = 448650^2 + 206941^2 .

It is a cyclic number.

It is not a de Polignac number, because 244111399981 - 2¹ = 244111399979 is a prime.

It is a super-2 number, since 2×244111399981² (a number of 24 digits) contains 22 as substring.

Together with 244111399979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (244111390981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122055699990 + 122055699991.

It is an arithmetic number, because the mean of its divisors is an integer number (122055699991).

Almost surely, 2^244111399981 is an apocalyptic number.

It is an amenable number.

244111399981 is a deficient number, since it is larger than the sum of its proper divisors (1).

244111399981 is an equidigital number, since it uses as much as digits as its factorization.

244111399981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 52.

The spelling of 244111399981 in words is "two hundred forty-four billion, one hundred eleven million, three hundred ninety-nine thousand, nine hundred eighty-one".