20110002111 has 10 divisors (see below), whose sum is σ = 30040867472. Its totient is φ = 13406668020.

The previous prime is 20110002109. The next prime is 20110002149. The reversal of 20110002111 is 11120001102.

It is a happy number.

It is not a de Polignac number, because 20110002111 - 2¹ = 20110002109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20110002093 and 20110002102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110002611) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 124135735 + ... + 124135896.

Almost surely, 2^20110002111 is an apocalyptic number.

20110002111 is a deficient number, since it is larger than the sum of its proper divisors (9930865361).

20110002111 is an equidigital number, since it uses as much as digits as its factorization.

20110002111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248271643 (or 248271634 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20110002111 its reverse (11120001102), we get a palindrome (31230003213).

The spelling of 20110002111 in words is "twenty billion, one hundred ten million, two thousand, one hundred eleven".