1244013121 has 8 divisors (see below), whose sum is σ = 1397954880. Its totient is φ = 1098392592.

The previous prime is 1244013119. The next prime is 1244013139. The reversal of 1244013121 is 1213104421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1244013121 - 2¹ = 1244013119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1244013101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2079991 + ... + 2080588.

It is an arithmetic number, because the mean of its divisors is an integer number (174744360).

Almost surely, 2^1244013121 is an apocalyptic number.

It is an amenable number.

1244013121 is a deficient number, since it is larger than the sum of its proper divisors (153941759).

1244013121 is a wasteful number, since it uses less digits than its factorization.

1244013121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4160615.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1244013121 is about 35270.5701825190. The cubic root of 1244013121 is about 1075.4948134181.

Adding to 1244013121 its reverse (1213104421), we get a palindrome (2457117542).

The spelling of 1244013121 in words is "one billion, two hundred forty-four million, thirteen thousand, one hundred twenty-one".