201012111 has 20 divisors (see below), whose sum is σ = 313335792.
Its totient is φ = 128180448.
The previous prime is 201012109. The next prime is 201012113. The reversal of 201012111 is 111210102.
It is a happy number.
It is an interprime number because it is at equal distance from previous prime (201012109) and next prime (201012113).
It is not a de Polignac number, because 201012111 - 21 = 201012109 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 = 201012093 and 201012102.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (201012113) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 52086 + ... + 55811.
Almost surely, 2201012111 is an apocalyptic number.
201012111 is a deficient number, since it is larger than the sum of its proper divisors (112323681).
201012111 is a wasteful number, since it uses less digits than its factorization.
201012111 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 107932 (or 107923 counting only the distinct ones).
The product of its (nonzero) digits is 4, while the sum is 9.
The square root of 201012111 is about 14177.8739943618.
The cubic root of 201012111 is about 585.7883651041.
Adding to 201012111 its reverse (111210102), we get a palindrome (312222213).
The spelling of 201012111 in words is "two hundred one million, twelve thousand, one hundred eleven".