1311102211 has 4 divisors (see below), whose sum is σ = 1311556752. Its totient is φ = 1310647672.

The previous prime is 1311102179. The next prime is 1311102227. The reversal of 1311102211 is 1122011131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1122011131 = 29 ⋅38690039.

It is a cyclic number.

It is not a de Polignac number, because 1311102211 - 2⁵ = 1311102179 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1311102191 and 1311102200.

It is not an unprimeable number, because it can be changed into a prime (1311102811) 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, 222916 + ... + 228721.

It is an arithmetic number, because the mean of its divisors is an integer number (327889188).

Almost surely, 2^1311102211 is an apocalyptic number.

1311102211 is a deficient number, since it is larger than the sum of its proper divisors (454541).

1311102211 is an equidigital number, since it uses as much as digits as its factorization.

1311102211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454540.

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

The square root of 1311102211 is about 36209.1454055464. The cubic root of 1311102211 is about 1094.4909711235.

Adding to 1311102211 its reverse (1122011131), we get a palindrome (2433113342).

It can be divided in two parts, 13 and 11102211, that added together give a square (11102224 = 3332²).

The spelling of 1311102211 in words is "one billion, three hundred eleven million, one hundred two thousand, two hundred eleven".