1244103402013 has 4 divisors (see below), whose sum is σ = 1244116136988. Its totient is φ = 1244090667040.

The previous prime is 1244103401963. The next prime is 1244103402023. The reversal of 1244103402013 is 3102043014421.

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 1207225192644 + 36878209369 = 1098738^2 + 192037^2 .

It is a cyclic number.

It is not a de Polignac number, because 1244103402013 - 2²¹ = 1244101304861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244103402023) 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 in 3 ways as a sum of consecutive naturals, for example, 6219808 + ... + 6416713.

It is an arithmetic number, because the mean of its divisors is an integer number (311029034247).

Almost surely, 2^{1244103402013} is an apocalyptic number.

It is an amenable number.

1244103402013 is a deficient number, since it is larger than the sum of its proper divisors (12734975).

1244103402013 is an equidigital number, since it uses as much as digits as its factorization.

1244103402013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12734974.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 1244103402013 its reverse (3102043014421), we get a palindrome (4346146416434).

The spelling of 1244103402013 in words is "one trillion, two hundred forty-four billion, one hundred three million, four hundred two thousand, thirteen".