12440201381 has 2 divisors, whose sum is σ = 12440201382. Its totient is φ = 12440201380.

The previous prime is 12440201377. The next prime is 12440201441. The reversal of 12440201381 is 18310204421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9893485156 + 2546716225 = 99466^2 + 50465^2 .

It is an emirp because it is prime and its reverse (18310204421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12440201381 - 2² = 12440201377 is a prime.

It is a super-2 number, since 2×12440201381² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12440201381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12440201581) 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, 6220100690 + 6220100691.

It is an arithmetic number, because the mean of its divisors is an integer number (6220100691).

Almost surely, 2^12440201381 is an apocalyptic number.

It is an amenable number.

12440201381 is a deficient number, since it is larger than the sum of its proper divisors (1).

12440201381 is an equidigital number, since it uses as much as digits as its factorization.

12440201381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 26.

The spelling of 12440201381 in words is "twelve billion, four hundred forty million, two hundred one thousand, three hundred eighty-one".