220111112212111 has 4 divisors (see below), whose sum is σ = 221717762666352. Its totient is φ = 218504461757872.

The previous prime is 220111112212093. The next prime is 220111112212141. The reversal of 220111112212111 is 111212211111022.

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

It is a cyclic number.

It is not a de Polignac number, because 220111112212111 - 2¹⁷ = 220111112081039 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 (220111112212141) 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, 803325226915 + ... + 803325227188.

It is an arithmetic number, because the mean of its divisors is an integer number (55429440666588).

Almost surely, 2^{220111112212111} is an apocalyptic number.

220111112212111 is a deficient number, since it is larger than the sum of its proper divisors (1606650454241).

220111112212111 is a wasteful number, since it uses less digits than its factorization.

220111112212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606650454240.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 220111112212111 its reverse (111212211111022), we get a palindrome (331323323323133).

The spelling of 220111112212111 in words is "two hundred twenty trillion, one hundred eleven billion, one hundred twelve million, two hundred twelve thousand, one hundred eleven".