11312443211 has 4 divisors (see below), whose sum is σ = 11804288592. Its totient is φ = 10820597832.

The previous prime is 11312443187. The next prime is 11312443249. The reversal of 11312443211 is 11234421311.

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 11312443211 - 2²² = 11308248907 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 491845357 = 11312443211 / (1 + 1 + 3 + 1 + 2 + 4 + 4 + 3 + 2 + 1 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11312443111) 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, 245922656 + ... + 245922701.

It is an arithmetic number, because the mean of its divisors is an integer number (2951072148).

Almost surely, 2^11312443211 is an apocalyptic number.

11312443211 is a deficient number, since it is larger than the sum of its proper divisors (491845381).

11312443211 is an equidigital number, since it uses as much as digits as its factorization.

11312443211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491845380.

The product of its digits is 576, while the sum is 23.

Adding to 11312443211 its reverse (11234421311), we get a palindrome (22546864522).

The spelling of 11312443211 in words is "eleven billion, three hundred twelve million, four hundred forty-three thousand, two hundred eleven".