1311432211 has 4 divisors (see below), whose sum is σ = 1339335072. Its totient is φ = 1283529352.

The previous prime is 1311432203. The next prime is 1311432233. The reversal of 1311432211 is 1122341131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1311432211 - 2³ = 1311432203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311432251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13951360 + ... + 13951453.

It is an arithmetic number, because the mean of its divisors is an integer number (334833768).

Almost surely, 2^1311432211 is an apocalyptic number.

1311432211 is a deficient number, since it is larger than the sum of its proper divisors (27902861).

1311432211 is an equidigital number, since it uses as much as digits as its factorization.

1311432211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27902860.

The product of its digits is 144, while the sum is 19.

The square root of 1311432211 is about 36213.7019786710. The cubic root of 1311432211 is about 1094.5827899812.

Adding to 1311432211 its reverse (1122341131), we get a palindrome (2433773342).

The spelling of 1311432211 in words is "one billion, three hundred eleven million, four hundred thirty-two thousand, two hundred eleven".