1312201311 has 8 divisors (see below), whose sum is σ = 1759268784. Its totient is φ = 869967360.

The previous prime is 1312201301. The next prime is 1312201327. The reversal of 1312201311 is 1131022131.

It is a happy number.

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

It is not a de Polignac number, because 1312201311 - 2⁷ = 1312201183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312201301) 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, 1207746 + ... + 1208831.

It is an arithmetic number, because the mean of its divisors is an integer number (219908598).

Almost surely, 2^1312201311 is an apocalyptic number.

1312201311 is a deficient number, since it is larger than the sum of its proper divisors (447067473).

1312201311 is a wasteful number, since it uses less digits than its factorization.

1312201311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2416761.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1312201311 is about 36224.3193310792. The cubic root of 1312201311 is about 1094.7967238015.

Adding to 1312201311 its reverse (1131022131), we get a palindrome (2443223442).

The spelling of 1312201311 in words is "one billion, three hundred twelve million, two hundred one thousand, three hundred eleven".