1021544240243 has 2 divisors, whose sum is σ = 1021544240244. Its totient is φ = 1021544240242.

The previous prime is 1021544240207. The next prime is 1021544240371. The reversal of 1021544240243 is 3420424451201.

1021544240243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1021544240243 - 2¹⁴ = 1021544223859 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021504240243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510772120121 + 510772120122.

It is an arithmetic number, because the mean of its divisors is an integer number (510772120122).

Almost surely, 2^{1021544240243} is an apocalyptic number.

1021544240243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021544240243 is an equidigital number, since it uses as much as digits as its factorization.

1021544240243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30720, while the sum is 32.

Adding to 1021544240243 its reverse (3420424451201), we get a palindrome (4441968691444).

The spelling of 1021544240243 in words is "one trillion, twenty-one billion, five hundred forty-four million, two hundred forty thousand, two hundred forty-three".