1243003244401 has 4 divisors (see below), whose sum is σ = 1243016780404. Its totient is φ = 1242989708400.

The previous prime is 1243003244393. The next prime is 1243003244473. The reversal of 1243003244401 is 1044423003421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 554101584400 + 688901660001 = 744380^2 + 830001^2 .

It is a cyclic number.

It is not a de Polignac number, because 1243003244401 - 2³ = 1243003244393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1243003244401.

It is not an unprimeable number, because it can be changed into a prime (1243003244491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6629310 + ... + 6814231.

It is an arithmetic number, because the mean of its divisors is an integer number (310754195101).

Almost surely, 2^{1243003244401} is an apocalyptic number.

It is an amenable number.

1243003244401 is a deficient number, since it is larger than the sum of its proper divisors (13536003).

1243003244401 is an equidigital number, since it uses as much as digits as its factorization.

1243003244401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13536002.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 1243003244401 its reverse (1044423003421), we get a palindrome (2287426247822).

The spelling of 1243003244401 in words is "one trillion, two hundred forty-three billion, three million, two hundred forty-four thousand, four hundred one".