121212120112 has 20 divisors (see below), whose sum is σ = 234906926056. Its totient is φ = 60590977920.

The previous prime is 121212120103. The next prime is 121212120167. The reversal of 121212120112 is 211021212121.

It is a Harshad number since it is a multiple of its sum of digits (16).

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, 876189 + ... + 1005052.

Almost surely, 2^121212120112 is an apocalyptic number.

It is an amenable number.

121212120112 is a deficient number, since it is larger than the sum of its proper divisors (113694805944).

121212120112 is a wasteful number, since it uses less digits than its factorization.

121212120112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1885276 (or 1885270 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121212120112 its reverse (211021212121), we get a palindrome (332233332233).

The spelling of 121212120112 in words is "one hundred twenty-one billion, two hundred twelve million, one hundred twenty thousand, one hundred twelve".