121121212112 has 20 divisors (see below), whose sum is σ = 234715917696. Its totient is φ = 60549362400.

The previous prime is 121121212099. The next prime is 121121212133. The reversal of 121121212112 is 211212121121.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 613514 + ... + 786537.

Almost surely, 2^121121212112 is an apocalyptic number.

It is an amenable number.

121121212112 is a deficient number, since it is larger than the sum of its proper divisors (113594705584).

121121212112 is a wasteful number, since it uses less digits than its factorization.

121121212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1405466 (or 1405460 counting only the distinct ones).

The product of its digits is 32, while the sum is 17.

Adding to 121121212112 its reverse (211212121121), we get a palindrome (332333333233).

Subtracting 121121212112 from its reverse (211212121121), we obtain a palindrome (90090909009).

The spelling of 121121212112 in words is "one hundred twenty-one billion, one hundred twenty-one million, two hundred twelve thousand, one hundred twelve".