1244021131013 has 32 divisors (see below), whose sum is σ = 1356271452000. Its totient is φ = 1136660152320.

The previous prime is 1244021131009. The next prime is 1244021131021. The reversal of 1244021131013 is 3101311204421.

It can be written as a sum of positive squares in 16 ways, for example, as 1089900504289 + 154120626724 = 1043983^2 + 392582^2 .

It is a cyclic number.

It is not a de Polignac number, because 1244021131013 - 2² = 1244021131009 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 1244021131013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244021131033) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52502873 + ... + 52526561.

It is an arithmetic number, because the mean of its divisors is an integer number (42383482875).

Almost surely, 2^{1244021131013} is an apocalyptic number.

It is an amenable number.

1244021131013 is a deficient number, since it is larger than the sum of its proper divisors (112250320987).

1244021131013 is a wasteful number, since it uses less digits than its factorization.

1244021131013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24425.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 1244021131013 its reverse (3101311204421), we get a palindrome (4345332335434).

The spelling of 1244021131013 in words is "one trillion, two hundred forty-four billion, twenty-one million, one hundred thirty-one thousand, thirteen".