2121212202222 has 16 divisors (see below), whose sum is σ = 4491978781392. Its totient is φ = 665478337920.

The previous prime is 2121212202211. The next prime is 2121212202227. The reversal of 2121212202222 is 2222022121212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121212202227) 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, 10398098929 + ... + 10398099132.

It is an arithmetic number, because the mean of its divisors is an integer number (280748673837).

Almost surely, 2^{2121212202222} is an apocalyptic number.

2121212202222 is an abundant number, since it is smaller than the sum of its proper divisors (2370766579170).

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

2121212202222 is a wasteful number, since it uses less digits than its factorization.

2121212202222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20796198083.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 2121212202222 its reverse (2222022121212), we get a palindrome (4343234323434).

The spelling of 2121212202222 in words is "two trillion, one hundred twenty-one billion, two hundred twelve million, two hundred two thousand, two hundred twenty-two".