2001102111 has 16 divisors (see below), whose sum is σ = 3060229120. Its totient is φ = 1291033080.

The previous prime is 2001102101. The next prime is 2001102119. The reversal of 2001102111 is 1112011002.

It is a happy number.

It is not a de Polignac number, because 2001102111 - 2²² = 1996907807 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 = 2001102093 and 2001102102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001102119) 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, 1194565 + ... + 1196238.

It is an arithmetic number, because the mean of its divisors is an integer number (191264320).

Almost surely, 2^2001102111 is an apocalyptic number.

2001102111 is a deficient number, since it is larger than the sum of its proper divisors (1059127009).

2001102111 is a wasteful number, since it uses less digits than its factorization.

2001102111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2390843 (or 2390837 counting only the distinct ones).

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

The square root of 2001102111 is about 44733.6798285140. The cubic root of 2001102111 is about 1260.1524362059.

Adding to 2001102111 its reverse (1112011002), we get a palindrome (3113113113).

The spelling of 2001102111 in words is "two billion, one million, one hundred two thousand, one hundred eleven".