20011012110 has 24 divisors (see below), whose sum is σ = 52028631720. Its totient is φ = 5336269872.

The previous prime is 20011012079. The next prime is 20011012157. The reversal of 20011012110 is 1121011002.

It is a happy number.

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 = 20011012092 and 20011012101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111172200 + ... + 111172379.

It is an arithmetic number, because the mean of its divisors is an integer number (2167859655).

Almost surely, 2^20011012110 is an apocalyptic number.

20011012110 is an abundant number, since it is smaller than the sum of its proper divisors (32017619610).

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

20011012110 is a wasteful number, since it uses less digits than its factorization.

20011012110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222344592 (or 222344589 counting only the distinct ones).

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

Adding to 20011012110 its reverse (1121011002), we get a palindrome (21132023112).

The spelling of 20011012110 in words is "twenty billion, eleven million, twelve thousand, one hundred ten".