220111010101 has 4 divisors (see below), whose sum is σ = 220378460512. Its totient is φ = 219843559692.

The previous prime is 220111010039. The next prime is 220111010191. The reversal of 220111010101 is 101010111022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220111010101 - 2⁹ = 220111009589 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 (220111010191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133723971 + ... + 133725616.

It is an arithmetic number, because the mean of its divisors is an integer number (55094615128).

Almost surely, 2^220111010101 is an apocalyptic number.

It is an amenable number.

220111010101 is a deficient number, since it is larger than the sum of its proper divisors (267450411).

220111010101 is an equidigital number, since it uses as much as digits as its factorization.

220111010101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267450410.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 220111010101 its reverse (101010111022), we get a palindrome (321121121123).

The spelling of 220111010101 in words is "two hundred twenty billion, one hundred eleven million, ten thousand, one hundred one".