20201010111 has 12 divisors (see below), whose sum is σ = 29278828488. Its totient is φ = 13421374704.

The previous prime is 20201010103. The next prime is 20201010157. The reversal of 20201010111 is 11101010202.

It is a happy number.

It is not a de Polignac number, because 20201010111 - 2³ = 20201010103 is a prime.

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 = 20201010093 and 20201010102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201210111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3827665 + ... + 3832938.

It is an arithmetic number, because the mean of its divisors is an integer number (2439902374).

Almost surely, 2^20201010111 is an apocalyptic number.

20201010111 is a deficient number, since it is larger than the sum of its proper divisors (9077818377).

20201010111 is a wasteful number, since it uses less digits than its factorization.

20201010111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7660902 (or 7660899 counting only the distinct ones).

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

Adding to 20201010111 its reverse (11101010202), we get a palindrome (31302020313).

Subtracting from 20201010111 its reverse (11101010202), we obtain a palindrome (9099999909).

The spelling of 20201010111 in words is "twenty billion, two hundred one million, ten thousand, one hundred eleven".