221021202220111 has 8 divisors (see below), whose sum is σ = 227997403615664. Its totient is φ = 214153158985920.

The previous prime is 221021202220051. The next prime is 221021202220163. The reversal of 221021202220111 is 111022202120122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221021202220111 - 2⁴¹ = 218822178964559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221021202220171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27039536190 + ... + 27039544363.

It is an arithmetic number, because the mean of its divisors is an integer number (28499675451958).

Almost surely, 2^{221021202220111} is an apocalyptic number.

221021202220111 is a deficient number, since it is larger than the sum of its proper divisors (6976201395553).

221021202220111 is an equidigital number, since it uses as much as digits as its factorization.

221021202220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54079080681.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221021202220111 its reverse (111022202120122), we get a palindrome (332043404340233).

The spelling of 221021202220111 in words is "two hundred twenty-one trillion, twenty-one billion, two hundred two million, two hundred twenty thousand, one hundred eleven".