113123121212 has 12 divisors (see below), whose sum is σ = 197975778000. Its totient is φ = 56558613216.

The previous prime is 113123121173. The next prime is 113123121229. The reversal of 113123121212 is 212121321311.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 649337 + ... + 804912.

It is an arithmetic number, because the mean of its divisors is an integer number (16497981500).

Almost surely, 2^113123121212 is an apocalyptic number.

It is an amenable number.

113123121212 is a deficient number, since it is larger than the sum of its proper divisors (84852656788).

113123121212 is a wasteful number, since it uses less digits than its factorization.

113123121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1473700 (or 1473698 counting only the distinct ones).

The product of its digits is 144, while the sum is 20.

Adding to 113123121212 its reverse (212121321311), we get a palindrome (325244442523).

The spelling of 113123121212 in words is "one hundred thirteen billion, one hundred twenty-three million, one hundred twenty-one thousand, two hundred twelve".