102212120212221 has 16 divisors (see below), whose sum is σ = 139453016141120. Its totient is φ = 66556337541120.

The previous prime is 102212120212183. The next prime is 102212120212277. The reversal of 102212120212221 is 122212021212201.

It is not a de Polignac number, because 102212120212221 - 2⁷ = 102212120212093 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 (102212120212621) 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, 20525181 + ... + 25014141.

It is an arithmetic number, because the mean of its divisors is an integer number (8715813508820).

Almost surely, 2^{102212120212221} is an apocalyptic number.

It is an amenable number.

102212120212221 is a deficient number, since it is larger than the sum of its proper divisors (37240895928899).

102212120212221 is a wasteful number, since it uses less digits than its factorization.

102212120212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4665516.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 102212120212221 its reverse (122212021212201), we get a palindrome (224424141424422).

The spelling of 102212120212221 in words is "one hundred two trillion, two hundred twelve billion, one hundred twenty million, two hundred twelve thousand, two hundred twenty-one".