1544012043121 has 2 divisors, whose sum is σ = 1544012043122. Its totient is φ = 1544012043120.

The previous prime is 1544012043109. The next prime is 1544012043157. The reversal of 1544012043121 is 1213402104451.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 900912298896 + 643099744225 = 949164^2 + 801935^2 .

It is a cyclic number.

It is not a de Polignac number, because 1544012043121 - 2¹⁵ = 1544012010353 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1544012043121.

It is not a weakly prime, because it can be changed into another prime (1544012043191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 772006021560 + 772006021561.

It is an arithmetic number, because the mean of its divisors is an integer number (772006021561).

Almost surely, 2^{1544012043121} is an apocalyptic number.

It is an amenable number.

1544012043121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1544012043121 is an equidigital number, since it uses as much as digits as its factorization.

1544012043121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 28.

Adding to 1544012043121 its reverse (1213402104451), we get a palindrome (2757414147572).

The spelling of 1544012043121 in words is "one trillion, five hundred forty-four billion, twelve million, forty-three thousand, one hundred twenty-one".