2102221210221 has 32 divisors (see below), whose sum is σ = 3397798656000. Its totient is φ = 1273972425840.

The previous prime is 2102221210147. The next prime is 2102221210231. The reversal of 2102221210221 is 1220121222012.

It is a happy number.

2102221210221 is a `hidden beast` number, since 2 + 10 + 2 + 221 + 210 + 221 = 666.

It is not a de Polignac number, because 2102221210221 - 2¹⁴ = 2102221193837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2102221210194 and 2102221210203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102221210231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3559180 + ... + 4107578.

It is an arithmetic number, because the mean of its divisors is an integer number (106181208000).

Almost surely, 2^{2102221210221} is an apocalyptic number.

It is an amenable number.

2102221210221 is a deficient number, since it is larger than the sum of its proper divisors (1295577445779).

2102221210221 is a wasteful number, since it uses less digits than its factorization.

2102221210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561326 (or 561320 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2102221210221 its reverse (1220121222012), we get a palindrome (3322342432233).

The spelling of 2102221210221 in words is "two trillion, one hundred two billion, two hundred twenty-one million, two hundred ten thousand, two hundred twenty-one".