201030111 has 12 divisors (see below), whose sum is σ = 292595160. Its totient is φ = 132996240.

The previous prime is 201030079. The next prime is 201030149. The reversal of 201030111 is 111030102.

It is not a de Polignac number, because 201030111 - 2⁵ = 201030079 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 = 201030093 and 201030102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201030161) 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, 84076 + ... + 86433.

It is an arithmetic number, because the mean of its divisors is an integer number (24382930).

Almost surely, 2^201030111 is an apocalyptic number.

201030111 is a deficient number, since it is larger than the sum of its proper divisors (91565049).

201030111 is a wasteful number, since it uses less digits than its factorization.

201030111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170646 (or 170643 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 201030111 is about 14178.5087720818. The cubic root of 201030111 is about 585.8058497485.

Adding to 201030111 its reverse (111030102), we get a palindrome (312060213).

Subtracting from 201030111 its reverse (111030102), we obtain a palindrome (90000009).

The spelling of 201030111 in words is "two hundred one million, thirty thousand, one hundred eleven".