11211231233 has 4 divisors (see below), whose sum is σ = 11269320708. Its totient is φ = 11153141760.

The previous prime is 11211231223. The next prime is 11211231253. The reversal of 11211231233 is 33213211211.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3280081984 + 7931149249 = 57272^2 + 89057^2 .

It is a cyclic number.

It is not a de Polignac number, because 11211231233 - 2⁴ = 11211231217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11211231223) 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, 29044448 + ... + 29044833.

It is an arithmetic number, because the mean of its divisors is an integer number (2817330177).

Almost surely, 2^11211231233 is an apocalyptic number.

It is an amenable number.

11211231233 is a deficient number, since it is larger than the sum of its proper divisors (58089475).

11211231233 is an equidigital number, since it uses as much as digits as its factorization.

11211231233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58089474.

The product of its digits is 216, while the sum is 20.

Adding to 11211231233 its reverse (33213211211), we get a palindrome (44424442444).

The spelling of 11211231233 in words is "eleven billion, two hundred eleven million, two hundred thirty-one thousand, two hundred thirty-three".