2102202111221 has 8 divisors (see below), whose sum is σ = 2122372307520. Its totient is φ = 2082041608608.

The previous prime is 2102202111197. The next prime is 2102202111227. The reversal of 2102202111221 is 1221112022012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2102202111221 is a prime.

It is a super-2 number, since 2×2102202111221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

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 2102202111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102202111227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1987241 + ... + 2855438.

It is an arithmetic number, because the mean of its divisors is an integer number (265296538440).

Almost surely, 2^{2102202111221} is an apocalyptic number.

It is an amenable number.

2102202111221 is a deficient number, since it is larger than the sum of its proper divisors (20170196299).

2102202111221 is a wasteful number, since it uses less digits than its factorization.

2102202111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4846843.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2102202111221 its reverse (1221112022012), we get a palindrome (3323314133233).

The spelling of 2102202111221 in words is "two trillion, one hundred two billion, two hundred two million, one hundred eleven thousand, two hundred twenty-one".