1220111010111 has 64 divisors (see below), whose sum is σ = 1952820264960. Its totient is φ = 662906090880.

The previous prime is 1220111010109. The next prime is 1220111010121. The reversal of 1220111010111 is 1110101110221.

It is not a de Polignac number, because 1220111010111 - 2¹ = 1220111010109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220111010121) 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 63 ways as a sum of consecutive naturals, for example, 76694820 + ... + 76710726.

It is an arithmetic number, because the mean of its divisors is an integer number (30512816640).

Almost surely, 2^{1220111010111} is an apocalyptic number.

1220111010111 is a deficient number, since it is larger than the sum of its proper divisors (732709254849).

1220111010111 is a wasteful number, since it uses less digits than its factorization.

1220111010111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18004.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 1220111010111 its reverse (1110101110221), we get a palindrome (2330212120332).

It can be divided in two parts, 12201110 and 10111, that added together give a palindrome (12211221).

The spelling of 1220111010111 in words is "one trillion, two hundred twenty billion, one hundred eleven million, ten thousand, one hundred eleven".