1313200121 has 2 divisors, whose sum is σ = 1313200122. Its totient is φ = 1313200120.

The previous prime is 1313200093. The next prime is 1313200129. The reversal of 1313200121 is 1210023131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1028805625 + 284394496 = 32075^2 + 16864^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313200121 - 2¹⁴ = 1313183737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1313200096 and 1313200105.

It is not a weakly prime, because it can be changed into another prime (1313200129) 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 as a sum of consecutive naturals, namely, 656600060 + 656600061.

It is an arithmetic number, because the mean of its divisors is an integer number (656600061).

Almost surely, 2^1313200121 is an apocalyptic number.

It is an amenable number.

1313200121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313200121 is an equidigital number, since it uses as much as digits as its factorization.

1313200121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1313200121 is about 36238.1031650389. The cubic root of 1313200121 is about 1095.0744293076.

Adding to 1313200121 its reverse (1210023131), we get a palindrome (2523223252).

The spelling of 1313200121 in words is "one billion, three hundred thirteen million, two hundred thousand, one hundred twenty-one".