1311428201 has 2 divisors, whose sum is σ = 1311428202. Its totient is φ = 1311428200.

The previous prime is 1311428141. The next prime is 1311428213. The reversal of 1311428201 is 1028241131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 802248976 + 509179225 = 28324^2 + 22565^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311428201 - 2¹⁸ = 1311166057 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1311428231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655714100 + 655714101.

It is an arithmetic number, because the mean of its divisors is an integer number (655714101).

Almost surely, 2^1311428201 is an apocalyptic number.

It is an amenable number.

1311428201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311428201 is an equidigital number, since it uses as much as digits as its factorization.

1311428201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 1311428201 is about 36213.6466128447. The cubic root of 1311428201 is about 1094.5816743354.

Adding to 1311428201 its reverse (1028241131), we get a palindrome (2339669332).

The spelling of 1311428201 in words is "one billion, three hundred eleven million, four hundred twenty-eight thousand, two hundred one".