102121021210221 has 16 divisors (see below), whose sum is σ = 162928125008320. Its totient is φ = 62843705359920.

The previous prime is 102121021210183. The next prime is 102121021210237. The reversal of 102121021210221 is 122012120121201.

102121021210221 is a `hidden beast` number, since 1 + 0 + 2 + 1 + 210 + 21 + 210 + 221 = 666.

It is not a de Polignac number, because 102121021210221 - 2²⁶ = 102120954101357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 102121021210194 and 102121021210203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102121021210421) 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, 145471539835 + ... + 145471540536.

It is an arithmetic number, because the mean of its divisors is an integer number (10183007813020).

Almost surely, 2^{102121021210221} is an apocalyptic number.

It is an amenable number.

102121021210221 is a deficient number, since it is larger than the sum of its proper divisors (60807103798099).

102121021210221 is a wasteful number, since it uses less digits than its factorization.

102121021210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290943080393 (or 290943080387 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 102121021210221 its reverse (122012120121201), we get a palindrome (224133141331422).

The spelling of 102121021210221 in words is "one hundred two trillion, one hundred twenty-one billion, twenty-one million, two hundred ten thousand, two hundred twenty-one".