2121102221212 has 24 divisors (see below), whose sum is σ = 4053764165472. Its totient is φ = 965181940800.

The previous prime is 2121102221177. The next prime is 2121102221233. The reversal of 2121102221212 is 2121222011212.

It is a self number, because there is not a number n which added to its sum of digits gives 2121102221212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287252839 + ... + 287260222.

It is an arithmetic number, because the mean of its divisors is an integer number (168906840228).

Almost surely, 2^{2121102221212} is an apocalyptic number.

It is an amenable number.

2121102221212 is a deficient number, since it is larger than the sum of its proper divisors (1932661944260).

2121102221212 is a wasteful number, since it uses less digits than its factorization.

2121102221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574513149 (or 574513147 counting only the distinct ones).

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

Adding to 2121102221212 its reverse (2121222011212), we get a palindrome (4242324232424).

The spelling of 2121102221212 in words is "two trillion, one hundred twenty-one billion, one hundred two million, two hundred twenty-one thousand, two hundred twelve".