12121211120112 has 60 divisors (see below), whose sum is σ = 33999130918584. Its totient is φ = 4031283135360.

The previous prime is 12121211120099. The next prime is 12121211120149. The reversal of 12121211120112 is 21102111212121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94941939 + ... + 95069522.

Almost surely, 2^{12121211120112} is an apocalyptic number.

12121211120112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12121211120112 is an abundant number, since it is smaller than the sum of its proper divisors (21877919798472).

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

12121211120112 is a wasteful number, since it uses less digits than its factorization.

12121211120112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190011918 (or 190011909 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 12121211120112 its reverse (21102111212121), we get a palindrome (33223322332233).

The spelling of 12121211120112 in words is "twelve trillion, one hundred twenty-one billion, two hundred eleven million, one hundred twenty thousand, one hundred twelve".