20120110111 has 16 divisors (see below), whose sum is σ = 20429504928. Its totient is φ = 19813248000.

The previous prime is 20120110081. The next prime is 20120110123. The reversal of 20120110111 is 11101102102.

It is a cyclic number.

It is not a de Polignac number, because 20120110111 - 2⁹ = 20120109599 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 (20120110151) 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, 21472435 + ... + 21473371.

It is an arithmetic number, because the mean of its divisors is an integer number (1276844058).

Almost surely, 2^20120110111 is an apocalyptic number.

20120110111 is a deficient number, since it is larger than the sum of its proper divisors (309394817).

20120110111 is a wasteful number, since it uses less digits than its factorization.

20120110111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1962.

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

Adding to 20120110111 its reverse (11101102102), we get a palindrome (31221212213).

The spelling of 20120110111 in words is "twenty billion, one hundred twenty million, one hundred ten thousand, one hundred eleven".