121201220200221 has 48 divisors (see below), whose sum is σ = 200179516402944. Its totient is φ = 69222777841152.

The previous prime is 121201220200219. The next prime is 121201220200283. The reversal of 121201220200221 is 122002022102121.

It is a happy number.

121201220200221 is a `hidden beast` number, since 1 + 2 + 1 + 20 + 1 + 220 + 200 + 221 = 666.

It is not a de Polignac number, because 121201220200221 - 2¹ = 121201220200219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121201220200194 and 121201220200203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121201220200201) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1371988165 + ... + 1372076501.

It is an arithmetic number, because the mean of its divisors is an integer number (4170406591728).

Almost surely, 2^{121201220200221} is an apocalyptic number.

It is an amenable number.

121201220200221 is a deficient number, since it is larger than the sum of its proper divisors (78978296202723).

121201220200221 is a wasteful number, since it uses less digits than its factorization.

121201220200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99130 (or 99127 counting only the distinct ones).

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

Adding to 121201220200221 its reverse (122002022102121), we get a palindrome (243203242302342).

The spelling of 121201220200221 in words is "one hundred twenty-one trillion, two hundred one billion, two hundred twenty million, two hundred thousand, two hundred twenty-one".