20101111110 has 24 divisors (see below), whose sum is σ = 52262889120. Its totient is φ = 5360296272.

The previous prime is 20101111099. The next prime is 20101111159. The reversal of 20101111110 is 1111110102.

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

It is a junction number, because it is equal to n+sod(n) for n = 20101111092 and 20101111101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111672750 + ... + 111672929.

It is an arithmetic number, because the mean of its divisors is an integer number (2177620380).

Almost surely, 2^20101111110 is an apocalyptic number.

20101111110 is an abundant number, since it is smaller than the sum of its proper divisors (32161778010).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20101111110 is a wasteful number, since it uses less digits than its factorization.

20101111110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223345692 (or 223345689 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 20101111110 its reverse (1111110102), we get a palindrome (21212221212).

The spelling of 20101111110 in words is "twenty billion, one hundred one million, one hundred eleven thousand, one hundred ten".