2121321222222 has 16 divisors (see below), whose sum is σ = 4357308456912. Its totient is φ = 687996072000.

The previous prime is 2121321222221. The next prime is 2121321222289. The reversal of 2121321222222 is 2222221231212.

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

It is a junction number, because it is equal to n+sod(n) for n = 2121321222192 and 2121321222201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121321222221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4777750279 + ... + 4777750722.

It is an arithmetic number, because the mean of its divisors is an integer number (272331778557).

Almost surely, 2^{2121321222222} is an apocalyptic number.

2121321222222 is an abundant number, since it is smaller than the sum of its proper divisors (2235987234690).

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

2121321222222 is a wasteful number, since it uses less digits than its factorization.

2121321222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9555501043.

The product of its digits is 1536, while the sum is 24.

Adding to 2121321222222 its reverse (2222221231212), we get a palindrome (4343542453434).

The spelling of 2121321222222 in words is "two trillion, one hundred twenty-one billion, three hundred twenty-one million, two hundred twenty-two thousand, two hundred twenty-two".