2121102112222 has 32 divisors (see below), whose sum is σ = 3256058361600. Its totient is φ = 1035979357248.

The previous prime is 2121102112183. The next prime is 2121102112229. The reversal of 2121102112222 is 2222112011212.

It is a self number, because there is not a number n which added to its sum of digits gives 2121102112222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121102112229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170926354 + ... + 170938762.

It is an arithmetic number, because the mean of its divisors is an integer number (101751823800).

Almost surely, 2^{2121102112222} is an apocalyptic number.

2121102112222 is a deficient number, since it is larger than the sum of its proper divisors (1134956249378).

2121102112222 is a wasteful number, since it uses less digits than its factorization.

2121102112222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21520.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 2121102112222 its reverse (2222112011212), we get a palindrome (4343214123434).

The spelling of 2121102112222 in words is "two trillion, one hundred twenty-one billion, one hundred two million, one hundred twelve thousand, two hundred twenty-two".