1212212212112 has 40 divisors (see below), whose sum is σ = 2565927421920. Its totient is φ = 550198753280.

The previous prime is 1212212212063. The next prime is 1212212212187. The reversal of 1212212212112 is 2112122122121.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4921937 + ... + 5162352.

It is an arithmetic number, because the mean of its divisors is an integer number (64148185548).

Almost surely, 2^{1212212212112} is an apocalyptic number.

It is an amenable number.

1212212212112 is an abundant number, since it is smaller than the sum of its proper divisors (1353715209808).

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

1212212212112 is a wasteful number, since it uses less digits than its factorization.

1212212212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10084991 (or 10084985 counting only the distinct ones).

The product of its digits is 128, while the sum is 20.

Adding to 1212212212112 its reverse (2112122122121), we get a palindrome (3324334334233).

The spelling of 1212212212112 in words is "one trillion, two hundred twelve billion, two hundred twelve million, two hundred twelve thousand, one hundred twelve".