2121222121102 has 16 divisors (see below), whose sum is σ = 3636426538080. Its totient is φ = 909083755008.

The previous prime is 2121222121091. The next prime is 2121222121111. The reversal of 2121222121102 is 2011212221212.

It is a self number, because there is not a number n which added to its sum of digits gives 2121222121102.

It is a congruent number.

It is an unprimeable number.

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, 251478 + ... + 2075014.

It is an arithmetic number, because the mean of its divisors is an integer number (227276658630).

Almost surely, 2^{2121222121102} is an apocalyptic number.

2121222121102 is a deficient number, since it is larger than the sum of its proper divisors (1515204416978).

2121222121102 is a wasteful number, since it uses less digits than its factorization.

2121222121102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1906635.

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

Adding to 2121222121102 its reverse (2011212221212), we get a palindrome (4132434342314).

The spelling of 2121222121102 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred two".