11123212133 has 12 divisors (see below), whose sum is σ = 12253998624. Its totient is φ = 10089136200.

The previous prime is 11123212127. The next prime is 11123212141. The reversal of 11123212133 is 33121232111.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-11123212133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11123212193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50153 + ... + 157358.

It is an arithmetic number, because the mean of its divisors is an integer number (1021166552).

Almost surely, 2^11123212133 is an apocalyptic number.

It is an amenable number.

11123212133 is a deficient number, since it is larger than the sum of its proper divisors (1130786491).

11123212133 is a wasteful number, since it uses less digits than its factorization.

11123212133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207976 (or 207965 counting only the distinct ones).

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

Adding to 11123212133 its reverse (33121232111), we get a palindrome (44244444244).

The spelling of 11123212133 in words is "eleven billion, one hundred twenty-three million, two hundred twelve thousand, one hundred thirty-three".