2121222121113 has 64 divisors (see below), whose sum is σ = 2997965260800. Its totient is φ = 1332940224000.

The previous prime is 2121222121111. The next prime is 2121222121121. The reversal of 2121222121113 is 3111212221212.

It is not a de Polignac number, because 2121222121113 - 2¹ = 2121222121111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2121222121113.

It is not an unprimeable number, because it can be changed into a prime (2121222121111) 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 63 ways as a sum of consecutive naturals, for example, 68210698 + ... + 68241788.

It is an arithmetic number, because the mean of its divisors is an integer number (46843207200).

Almost surely, 2^{2121222121113} is an apocalyptic number.

It is an amenable number.

2121222121113 is a deficient number, since it is larger than the sum of its proper divisors (876743139687).

2121222121113 is a wasteful number, since it uses less digits than its factorization.

2121222121113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31374.

The product of its digits is 192, while the sum is 21.

Adding to 2121222121113 its reverse (3111212221212), we get a palindrome (5232434342325).

The spelling of 2121222121113 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred thirteen".