20110102111 has 24 divisors (see below), whose sum is σ = 23902845120. Its totient is φ = 16840327680.

The previous prime is 20110102109. The next prime is 20110102127. The reversal of 20110102111 is 11120101102.

It is not a de Polignac number, because 20110102111 - 2¹ = 20110102109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110102511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7326 + ... + 200683.

It is an arithmetic number, because the mean of its divisors is an integer number (995951880).

Almost surely, 2^20110102111 is an apocalyptic number.

20110102111 is a deficient number, since it is larger than the sum of its proper divisors (3792743009).

20110102111 is a wasteful number, since it uses less digits than its factorization.

20110102111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208095 (or 208084 counting only the distinct ones).

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

Adding to 20110102111 its reverse (11120101102), we get a palindrome (31230203213).

It can be divided in two parts, 20110 and 102111, that added together give a palindrome (122221).

The spelling of 20110102111 in words is "twenty billion, one hundred ten million, one hundred two thousand, one hundred eleven".