221103321022221 has 32 divisors (see below), whose sum is σ = 330330332368896. Its totient is φ = 130367121192000.

The previous prime is 221103321022201. The next prime is 221103321022231. The reversal of 221103321022221 is 122220123301122.

221103321022221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-221103321022221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221103321022191 and 221103321022200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221103321022201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2879976 + ... + 21225006.

It is an arithmetic number, because the mean of its divisors is an integer number (10322822886528).

Almost surely, 2^{221103321022221} is an apocalyptic number.

It is an amenable number.

221103321022221 is a deficient number, since it is larger than the sum of its proper divisors (109227011346675).

221103321022221 is a wasteful number, since it uses less digits than its factorization.

221103321022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18354953.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 221103321022221 its reverse (122220123301122), we get a palindrome (343323444323343).

The spelling of 221103321022221 in words is "two hundred twenty-one trillion, one hundred three billion, three hundred twenty-one million, twenty-two thousand, two hundred twenty-one".