221200121110221 has 192 divisors, whose sum is σ = 375136112332800. Its totient is φ = 124114835865600.

The previous prime is 221200121110217. The next prime is 221200121110291. The reversal of 221200121110221 is 122011121002122.

221200121110221 is a `hidden beast` number, since 2 + 21 + 200 + 1 + 211 + 10 + 221 = 666.

221200121110221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221200121110221 - 2² = 221200121110217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221200121110194 and 221200121110203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221200121110291) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 50170131865 + ... + 50170136273.

It is an arithmetic number, because the mean of its divisors is an integer number (1953833918400).

Almost surely, 2^{221200121110221} is an apocalyptic number.

It is an amenable number.

221200121110221 is a deficient number, since it is larger than the sum of its proper divisors (153935991222579).

221200121110221 is a wasteful number, since it uses less digits than its factorization.

221200121110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6340 (or 6337 counting only the distinct ones).

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

Adding to 221200121110221 its reverse (122011121002122), we get a palindrome (343211242112343).

The spelling of 221200121110221 in words is "two hundred twenty-one trillion, two hundred billion, one hundred twenty-one million, one hundred ten thousand, two hundred twenty-one".