11123131011212 has 36 divisors (see below), whose sum is σ = 21607781108928. Its totient is φ = 5005909524000.

The previous prime is 11123131011197. The next prime is 11123131011299. The reversal of 11123131011212 is 21211013132111.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113721788 + ... + 113819555.

Almost surely, 2^{11123131011212} is an apocalyptic number.

It is an amenable number.

11123131011212 is a deficient number, since it is larger than the sum of its proper divisors (10484650097716).

11123131011212 is a wasteful number, since it uses less digits than its factorization.

11123131011212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227541470 (or 227541457 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 11123131011212 its reverse (21211013132111), we get a palindrome (32334144143323).

The spelling of 11123131011212 in words is "eleven trillion, one hundred twenty-three billion, one hundred thirty-one million, eleven thousand, two hundred twelve".