1212212212212 has 96 divisors (see below), whose sum is σ = 3070235750400. Its totient is φ = 371021288832.

The previous prime is 1212212212207. The next prime is 1212212212229. The reversal of 1212212212212 is 2122122122121.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 554614 + ... + 1652882.

It is an arithmetic number, because the mean of its divisors is an integer number (31981622400).

Almost surely, 2^{1212212212212} is an apocalyptic number.

1212212212212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212212212212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1535117875200).

1212212212212 is an abundant number, since it is smaller than the sum of its proper divisors (1858023538188).

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

1212212212212 is a wasteful number, since it uses less digits than its factorization.

1212212212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098445 (or 1098443 counting only the distinct ones).

The product of its digits is 256, while the sum is 21.

Adding to 1212212212212 its reverse (2122122122121), we get a palindrome (3334334334333).

Subtracting 1212212212212 from its reverse (2122122122121), we obtain a palindrome (909909909909).

The spelling of 1212212212212 in words is "one trillion, two hundred twelve billion, two hundred twelve million, two hundred twelve thousand, two hundred twelve".