1313044121 has 2 divisors, whose sum is σ = 1313044122. Its totient is φ = 1313044120.

The previous prime is 1313044099. The next prime is 1313044129. The reversal of 1313044121 is 1214403131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 740112025 + 572932096 = 27205^2 + 23936^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313044121 - 2¹⁰ = 1313043097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1313044093 and 1313044102.

It is not a weakly prime, because it can be changed into another prime (1313044129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656522060 + 656522061.

It is an arithmetic number, because the mean of its divisors is an integer number (656522061).

Almost surely, 2^1313044121 is an apocalyptic number.

It is an amenable number.

1313044121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313044121 is an equidigital number, since it uses as much as digits as its factorization.

1313044121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1313044121 is about 36235.9506705702. The cubic root of 1313044121 is about 1095.0310649152.

Adding to 1313044121 its reverse (1214403131), we get a palindrome (2527447252).

The spelling of 1313044121 in words is "one billion, three hundred thirteen million, forty-four thousand, one hundred twenty-one".