221210021222111 has 32 divisors (see below), whose sum is σ = 238902099480576. Its totient is φ = 204307583040000.

The previous prime is 221210021222093. The next prime is 221210021222137. The reversal of 221210021222111 is 111222120012122.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221210021222111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221210024222111) 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, 35722235 + ... + 41454771.

It is an arithmetic number, because the mean of its divisors is an integer number (7465690608768).

Almost surely, 2^{221210021222111} is an apocalyptic number.

221210021222111 is a deficient number, since it is larger than the sum of its proper divisors (17692078258465).

221210021222111 is a wasteful number, since it uses less digits than its factorization.

221210021222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5733023.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 221210021222111 its reverse (111222120012122), we get a palindrome (332432141234233).

The spelling of 221210021222111 in words is "two hundred twenty-one trillion, two hundred ten billion, twenty-one million, two hundred twenty-two thousand, one hundred eleven".