221110012201221 has 48 divisors (see below), whose sum is σ = 377916393516480. Its totient is φ = 122807995810560.

The previous prime is 221110012201109. The next prime is 221110012201271. The reversal of 221110012201221 is 122102210011122.

221110012201221 is a `hidden beast` number, since 2 + 211 + 10 + 0 + 1 + 220 + 1 + 221 = 666.

221110012201221 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221110012201221 - 2¹⁵ = 221110012168453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221110012201194 and 221110012201203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221110012201271) 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, 617816256 + ... + 618174041.

It is an arithmetic number, because the mean of its divisors is an integer number (7873258198260).

Almost surely, 2^{221110012201221} is an apocalyptic number.

It is an amenable number.

221110012201221 is a deficient number, since it is larger than the sum of its proper divisors (156806381315259).

221110012201221 is a wasteful number, since it uses less digits than its factorization.

221110012201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235990466 (or 1235990463 counting only the distinct ones).

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

Adding to 221110012201221 its reverse (122102210011122), we get a palindrome (343212222212343).

The spelling of 221110012201221 in words is "two hundred twenty-one trillion, one hundred ten billion, twelve million, two hundred one thousand, two hundred twenty-one".