2122221221212 has 48 divisors (see below), whose sum is σ = 3913519357440. Its totient is φ = 1004192525952.

The previous prime is 2122221221189. The next prime is 2122221221233. The reversal of 2122221221212 is 2121221222212.

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 425548183 + ... + 425553169.

It is an arithmetic number, because the mean of its divisors is an integer number (81531653280).

Almost surely, 2^{2122221221212} is an apocalyptic number.

It is an amenable number.

2122221221212 is a deficient number, since it is larger than the sum of its proper divisors (1791298136228).

2122221221212 is a wasteful number, since it uses less digits than its factorization.

2122221221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9850 (or 9848 counting only the distinct ones).

The product of its digits is 512, while the sum is 22.

Adding to 2122221221212 its reverse (2121221222212), we get a palindrome (4243442443424).

The spelling of 2122221221212 in words is "two trillion, one hundred twenty-two billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred twelve".