1212100120112 has 20 divisors (see below), whose sum is σ = 2683935980496. Its totient is φ = 519471480000.

The previous prime is 1212100120087. The next prime is 1212100120117. The reversal of 1212100120112 is 2110210012121.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (1212100120117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5411161139 + ... + 5411161362.

Almost surely, 2^{1212100120112} is an apocalyptic number.

It is an amenable number.

1212100120112 is an abundant number, since it is smaller than the sum of its proper divisors (1471835860384).

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

1212100120112 is a wasteful number, since it uses less digits than its factorization.

1212100120112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10822322516 (or 10822322510 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1212100120112 its reverse (2110210012121), we get a palindrome (3322310132233).

The spelling of 1212100120112 in words is "one trillion, two hundred twelve billion, one hundred million, one hundred twenty thousand, one hundred twelve".