2112121121212 has 24 divisors (see below), whose sum is σ = 3747772476000. Its totient is φ = 1041336147456.

The previous prime is 2112121121197. The next prime is 2112121121219. The reversal of 2112121121212 is 2121211212112.

It is a happy number.

It is a super-2 number, since 2×2112121121212² (a number of 25 digits) contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2112121121212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112121121219) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 289089 + ... + 2075527.

It is an arithmetic number, because the mean of its divisors is an integer number (156157186500).

Almost surely, 2^{2112121121212} is an apocalyptic number.

It is an amenable number.

2112121121212 is a deficient number, since it is larger than the sum of its proper divisors (1635651354788).

2112121121212 is a wasteful number, since it uses less digits than its factorization.

2112121121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1790565 (or 1790563 counting only the distinct ones).

The product of its digits is 64, while the sum is 19.

Adding to 2112121121212 its reverse (2121211212112), we get a palindrome (4233332333324).

It can be divided in two parts, 2112121 and 121212, that multiplied together give a palindrome (256014410652).

The spelling of 2112121121212 in words is "two trillion, one hundred twelve billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred twelve".