2121212122222 has 8 divisors (see below), whose sum is σ = 3184345445400. Its totient is φ = 1059763640424.

The previous prime is 2121212122217. The next prime is 2121212122223. The reversal of 2121212122222 is 2222212121212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2121212122222² (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 junction number, because it is equal to n+sod(n) for n = 2121212122193 and 2121212122202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121212122223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 421207197 + ... + 421212232.

It is an arithmetic number, because the mean of its divisors is an integer number (398043180675).

Almost surely, 2^{2121212122222} is an apocalyptic number.

2121212122222 is a deficient number, since it is larger than the sum of its proper divisors (1063133323178).

2121212122222 is a wasteful number, since it uses less digits than its factorization.

2121212122222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842420690.

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

Adding to 2121212122222 its reverse (2222212121212), we get a palindrome (4343424243434).

The spelling of 2121212122222 in words is "two trillion, one hundred twenty-one billion, two hundred twelve million, one hundred twenty-two thousand, two hundred twenty-two".