11323131211 has 4 divisors (see below), whose sum is σ = 12940721392. Its totient is φ = 9705541032.

The previous prime is 11323131203. The next prime is 11323131217. The reversal of 11323131211 is 11213132311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11213132311 = 71 ⋅157931441.

It is a cyclic number.

It is not a de Polignac number, because 11323131211 - 2³ = 11323131203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11323131217) 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, 808795080 + ... + 808795093.

It is an arithmetic number, because the mean of its divisors is an integer number (3235180348).

Almost surely, 2^11323131211 is an apocalyptic number.

11323131211 is a deficient number, since it is larger than the sum of its proper divisors (1617590181).

11323131211 is an equidigital number, since it uses as much as digits as its factorization.

11323131211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1617590180.

The product of its digits is 108, while the sum is 19.

Adding to 11323131211 its reverse (11213132311), we get a palindrome (22536263522).

The spelling of 11323131211 in words is "eleven billion, three hundred twenty-three million, one hundred thirty-one thousand, two hundred eleven".