1311423211 has 6 divisors (see below), whose sum is σ = 1525533180. Its totient is φ = 1124076996.

The previous prime is 1311423199. The next prime is 1311423229. The reversal of 1311423211 is 1123241131.

It is not a de Polignac number, because 1311423211 - 2¹³ = 1311415019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311423241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13381821 + ... + 13381918.

It is an arithmetic number, because the mean of its divisors is an integer number (254255530).

Almost surely, 2^1311423211 is an apocalyptic number.

1311423211 is a deficient number, since it is larger than the sum of its proper divisors (214109969).

1311423211 is an equidigital number, since it uses as much as digits as its factorization.

1311423211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26763753 (or 26763746 counting only the distinct ones).

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

The square root of 1311423211 is about 36213.5777160998. The cubic root of 1311423211 is about 1094.5802860349.

Adding to 1311423211 its reverse (1123241131), we get a palindrome (2434664342).

The spelling of 1311423211 in words is "one billion, three hundred eleven million, four hundred twenty-three thousand, two hundred eleven".