1311001201 has 4 divisors (see below), whose sum is σ = 1323729472. Its totient is φ = 1298272932.

The previous prime is 1311001171. The next prime is 1311001207. The reversal of 1311001201 is 1021001131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1021001131 = 137 ⋅7452563.

It is a cyclic number.

It is not a de Polignac number, because 1311001201 - 2⁹ = 1311000689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311001207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6363981 + ... + 6364186.

It is an arithmetic number, because the mean of its divisors is an integer number (330932368).

Almost surely, 2^1311001201 is an apocalyptic number.

It is an amenable number.

1311001201 is a deficient number, since it is larger than the sum of its proper divisors (12728271).

1311001201 is a wasteful number, since it uses less digits than its factorization.

1311001201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12728270.

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 1311001201 is about 36207.7505653141. The cubic root of 1311001201 is about 1094.4628631262.

Adding to 1311001201 its reverse (1021001131), we get a palindrome (2332002332).

The spelling of 1311001201 in words is "one billion, three hundred eleven million, one thousand, two hundred one".