2121222202113 has 16 divisors (see below), whose sum is σ = 3301111756800. Its totient is φ = 1186337036496.

The previous prime is 2121222202111. The next prime is 2121222202139. The reversal of 2121222202113 is 3112022221212.

It is not a de Polignac number, because 2121222202113 - 2¹ = 2121222202111 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121222202113.

It is not an unprimeable number, because it can be changed into a prime (2121222202111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1074579663 + ... + 1074581636.

It is an arithmetic number, because the mean of its divisors is an integer number (206319484800).

Almost surely, 2^{2121222202113} is an apocalyptic number.

It is an amenable number.

2121222202113 is a deficient number, since it is larger than the sum of its proper divisors (1179889554687).

2121222202113 is a wasteful number, since it uses less digits than its factorization.

2121222202113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2149161356.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 2121222202113 its reverse (3112022221212), we get a palindrome (5233244423325).

The spelling of 2121222202113 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-two million, two hundred two thousand, one hundred thirteen".