11121212113 has 8 divisors (see below), whose sum is σ = 12133075680. Its totient is φ = 10109489280.

The previous prime is 11121211987. The next prime is 11121212153. The reversal of 11121212113 is 31121212111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11121212113 - 2⁹ = 11121211601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11121212153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196306 + ... + 246532.

It is an arithmetic number, because the mean of its divisors is an integer number (1516634460).

Almost surely, 2^11121212113 is an apocalyptic number.

It is an amenable number.

11121212113 is a deficient number, since it is larger than the sum of its proper divisors (1011863567).

11121212113 is a wasteful number, since it uses less digits than its factorization.

11121212113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70367.

The product of its digits is 24, while the sum is 16.

Adding to 11121212113 its reverse (31121212111), we get a palindrome (42242424224).

The spelling of 11121212113 in words is "eleven billion, one hundred twenty-one million, two hundred twelve thousand, one hundred thirteen".