220111111021111 has 16 divisors (see below), whose sum is σ = 228285854124480. Its totient is φ = 212117458924800.

The previous prime is 220111111021063. The next prime is 220111111021121. The reversal of 220111111021111 is 111120111111022.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220111111021111 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 (220111111021121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153802200 + ... + 155226733.

It is an arithmetic number, because the mean of its divisors is an integer number (14267865882780).

Almost surely, 2^{220111111021111} is an apocalyptic number.

220111111021111 is a deficient number, since it is larger than the sum of its proper divisors (8174743103369).

220111111021111 is a wasteful number, since it uses less digits than its factorization.

220111111021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309029226.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 220111111021111 its reverse (111120111111022), we get a palindrome (331231222132133).

The spelling of 220111111021111 in words is "two hundred twenty trillion, one hundred eleven billion, one hundred eleven million, twenty-one thousand, one hundred eleven".