121112202100221 has 16 divisors (see below), whose sum is σ = 181013320744320. Its totient is φ = 80026941798720.

The previous prime is 121112202100181. The next prime is 121112202100229. The reversal of 121112202100221 is 122001202211121.

121112202100221 is a `hidden beast` number, since 1 + 2 + 1 + 11 + 220 + 210 + 0 + 221 = 666.

It is not a de Polignac number, because 121112202100221 - 2¹⁸ = 121112201838077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121112202100194 and 121112202100203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121112202100229) 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, 19847948785 + ... + 19847954886.

It is an arithmetic number, because the mean of its divisors is an integer number (11313332546520).

Almost surely, 2^{121112202100221} is an apocalyptic number.

It is an amenable number.

121112202100221 is a deficient number, since it is larger than the sum of its proper divisors (59901118644099).

121112202100221 is a wasteful number, since it uses less digits than its factorization.

121112202100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39695903793 (or 39695903787 counting only the distinct ones).

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

Adding to 121112202100221 its reverse (122001202211121), we get a palindrome (243113404311342).

The spelling of 121112202100221 in words is "one hundred twenty-one trillion, one hundred twelve billion, two hundred two million, one hundred thousand, two hundred twenty-one".