1212121112012 has 12 divisors (see below), whose sum is σ = 2121333843720. Its totient is φ = 606025728096.

The previous prime is 1212121112003. The next prime is 1212121112017. The reversal of 1212121112012 is 2102111212121.

It is not an unprimeable number, because it can be changed into a prime (1212121112017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8628593 + ... + 8767944.

It is an arithmetic number, because the mean of its divisors is an integer number (176777820310).

Almost surely, 2^{1212121112012} is an apocalyptic number.

It is an amenable number.

1212121112012 is a deficient number, since it is larger than the sum of its proper divisors (909212731708).

1212121112012 is a wasteful number, since it uses less digits than its factorization.

1212121112012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17413960 (or 17413958 counting only the distinct ones).

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

Adding to 1212121112012 its reverse (2102111212121), we get a palindrome (3314232324133).

The spelling of 1212121112012 in words is "one trillion, two hundred twelve billion, one hundred twenty-one million, one hundred twelve thousand, twelve".