1311210211 has 8 divisors (see below), whose sum is σ = 1327654800. Its totient is φ = 1294803840.

The previous prime is 1311210169. The next prime is 1311210239. The reversal of 1311210211 is 1120121131.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1311210211 - 2⁹ = 1311209699 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1311210191 and 1311210200.

It is not an unprimeable number, because it can be changed into a prime (1311210011) 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, 62896 + ... + 81106.

It is an arithmetic number, because the mean of its divisors is an integer number (165956850).

Almost surely, 2^1311210211 is an apocalyptic number.

1311210211 is a deficient number, since it is larger than the sum of its proper divisors (16444589).

1311210211 is an equidigital number, since it uses as much as digits as its factorization.

1311210211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19109.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1311210211 is about 36210.6367107788. The cubic root of 1311210211 is about 1094.5210226274.

Adding to 1311210211 its reverse (1120121131), we get a palindrome (2431331342).

The spelling of 1311210211 in words is "one billion, three hundred eleven million, two hundred ten thousand, two hundred eleven".