220221211212111 has 4 divisors (see below), whose sum is σ = 293628281616152. Its totient is φ = 146814140808072.

The previous prime is 220221211212077. The next prime is 220221211212169. The reversal of 220221211212111 is 111212112122022.

220221211212111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 220221211212111 - 2⁷ = 220221211211983 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 (220221218212111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36703535202016 + ... + 36703535202021.

It is an arithmetic number, because the mean of its divisors is an integer number (73407070404038).

Almost surely, 2^{220221211212111} is an apocalyptic number.

220221211212111 is a deficient number, since it is larger than the sum of its proper divisors (73407070404041).

220221211212111 is an equidigital number, since it uses as much as digits as its factorization.

220221211212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73407070404040.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 220221211212111 its reverse (111212112122022), we get a palindrome (331433323334133).

The spelling of 220221211212111 in words is "two hundred twenty trillion, two hundred twenty-one billion, two hundred eleven million, two hundred twelve thousand, one hundred eleven".