102121120120221 has 12 divisors (see below), whose sum is σ = 147841260435648. Its totient is φ = 67927065600264.

The previous prime is 102121120120213. The next prime is 102121120120267. The reversal of 102121120120221 is 122021021121201.

102121120120221 is a `hidden beast` number, since 1 + 0 + 212 + 11 + 201 + 20 + 221 = 666.

It is not a de Polignac number, because 102121120120221 - 2³ = 102121120120213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102121120120194 and 102121120120203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102121120120211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12806758005 + ... + 12806765978.

It is an arithmetic number, because the mean of its divisors is an integer number (12320105036304).

Almost surely, 2^{102121120120221} is an apocalyptic number.

It is an amenable number.

102121120120221 is a deficient number, since it is larger than the sum of its proper divisors (45720140315427).

102121120120221 is a wasteful number, since it uses less digits than its factorization.

102121120120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25613524432 (or 25613524429 counting only the distinct ones).

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

Adding to 102121120120221 its reverse (122021021121201), we get a palindrome (224142141241422).

The spelling of 102121120120221 in words is "one hundred two trillion, one hundred twenty-one billion, one hundred twenty million, one hundred twenty thousand, two hundred twenty-one".