121212012111112 has 64 divisors (see below), whose sum is σ = 250450044768000. Its totient is φ = 54642318280704.

The previous prime is 121212012111103. The next prime is 121212012111133. The reversal of 121212012111112 is 211111210212121.

It is a self number, because there is not a number n which added to its sum of digits gives 121212012111112.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 722452689 + ... + 722620447.

It is an arithmetic number, because the mean of its divisors is an integer number (3913281949500).

Almost surely, 2^{121212012111112} is an apocalyptic number.

It is an amenable number.

121212012111112 is an abundant number, since it is smaller than the sum of its proper divisors (129238032656888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121212012111112 is a wasteful number, since it uses less digits than its factorization.

121212012111112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329390 (or 329386 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 121212012111112 its reverse (211111210212121), we get a palindrome (332323222323233).

The spelling of 121212012111112 in words is "one hundred twenty-one trillion, two hundred twelve billion, twelve million, one hundred eleven thousand, one hundred twelve".