20110122111 has 4 divisors (see below), whose sum is σ = 26813496152. Its totient is φ = 13406748072.

The previous prime is 20110122089. The next prime is 20110122119. The reversal of 20110122111 is 11122101102.

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

It is not a de Polignac number, because 20110122111 - 2⁶ = 20110122047 is a prime.

It is a super-2 number, since 2×20110122111² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110122119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3351687016 + ... + 3351687021.

It is an arithmetic number, because the mean of its divisors is an integer number (6703374038).

Almost surely, 2^20110122111 is an apocalyptic number.

20110122111 is a deficient number, since it is larger than the sum of its proper divisors (6703374041).

20110122111 is an equidigital number, since it uses as much as digits as its factorization.

20110122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6703374040.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20110122111 its reverse (11122101102), we get a palindrome (31232223213).

The spelling of 20110122111 in words is "twenty billion, one hundred ten million, one hundred twenty-two thousand, one hundred eleven".