220111111211021 has 8 divisors (see below), whose sum is σ = 220640426344800. Its totient is φ = 219581815079440.

The previous prime is 220111111210927. The next prime is 220111111211023. The reversal of 220111111211021 is 120112111111022.

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

It is a cyclic number.

It is not a de Polignac number, because 220111111211021 - 2¹⁸ = 220111110948877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220111111211023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18581831 + ... + 28026891.

It is an arithmetic number, because the mean of its divisors is an integer number (27580053293100).

Almost surely, 2^{220111111211021} is an apocalyptic number.

It is an amenable number.

220111111211021 is a deficient number, since it is larger than the sum of its proper divisors (529315133779).

220111111211021 is an equidigital number, since it uses as much as digits as its factorization.

220111111211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9501099.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 220111111211021 its reverse (120112111111022), we get a palindrome (340223222322043).

Subtracting from 220111111211021 its reverse (120112111111022), we obtain a palindrome (99999000099999).

The spelling of 220111111211021 in words is "two hundred twenty trillion, one hundred eleven billion, one hundred eleven million, two hundred eleven thousand, twenty-one".