220211111111 has 4 divisors (see below), whose sum is σ = 222864257112. Its totient is φ = 217557965112.

The previous prime is 220211111053. The next prime is 220211111117. The reversal of 220211111111 is 111111112022.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220211111111 is a prime.

It is a Duffinian number.

220211111111 is a modest number, since divided by 1111111 gives 22021 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220211111117) 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, 1326572876 + ... + 1326573041.

It is an arithmetic number, because the mean of its divisors is an integer number (55716064278).

Almost surely, 2^220211111111 is an apocalyptic number.

220211111111 is a deficient number, since it is larger than the sum of its proper divisors (2653146001).

220211111111 is an equidigital number, since it uses as much as digits as its factorization.

220211111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2653146000.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 220211111111 its reverse (111111112022), we get a palindrome (331322223133).

The spelling of 220211111111 in words is "two hundred twenty billion, two hundred eleven million, one hundred eleven thousand, one hundred eleven".