2102122022221 has 16 divisors (see below), whose sum is σ = 2266548673536. Its totient is φ = 1938085301376.

The previous prime is 2102122022213. The next prime is 2102122022237. The reversal of 2102122022221 is 1222202212012.

It is a cyclic number.

It is not a de Polignac number, because 2102122022221 - 2³ = 2102122022213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102122022281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146963556 + ... + 146977858.

It is an arithmetic number, because the mean of its divisors is an integer number (141659292096).

Almost surely, 2^{2102122022221} is an apocalyptic number.

It is an amenable number.

2102122022221 is a deficient number, since it is larger than the sum of its proper divisors (164426651315).

2102122022221 is a wasteful number, since it uses less digits than its factorization.

2102122022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27132.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 2102122022221 its reverse (1222202212012), we get a palindrome (3324324234233).

The spelling of 2102122022221 in words is "two trillion, one hundred two billion, one hundred twenty-two million, twenty-two thousand, two hundred twenty-one".