1201110111 has 6 divisors (see below), whose sum is σ = 1734936840. Its totient is φ = 800740068.

The previous prime is 1201110103. The next prime is 1201110121. The reversal of 1201110111 is 1110111021.

It is not a de Polignac number, because 1201110111 - 2³ = 1201110103 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 133456679 = 1201110111 / (1 + 2 + 0 + 1 + 1 + 1 + 0 + 1 + 1 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 1201110093 and 1201110102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201110101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66728331 + ... + 66728348.

It is an arithmetic number, because the mean of its divisors is an integer number (289156140).

Almost surely, 2^1201110111 is an apocalyptic number.

1201110111 is a deficient number, since it is larger than the sum of its proper divisors (533826729).

1201110111 is a wasteful number, since it uses less digits than its factorization.

1201110111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133456685 (or 133456682 counting only the distinct ones).

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

The square root of 1201110111 is about 34657.0355195017. The cubic root of 1201110111 is about 1062.9861540121.

Adding to 1201110111 its reverse (1110111021), we get a palindrome (2311221132).

It can be divided in two parts, 12011 and 10111, that added together give a palindrome (22122).

The spelling of 1201110111 in words is "one billion, two hundred one million, one hundred ten thousand, one hundred eleven".