1200112101 has 12 divisors (see below), whose sum is σ = 1808864928. Its totient is φ = 765288744.

The previous prime is 1200112099. The next prime is 1200112117. The reversal of 1200112101 is 1012110021.

It is a happy number.

It is not a de Polignac number, because 1200112101 - 2¹ = 1200112099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200112141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2898615 + ... + 2899028.

It is an arithmetic number, because the mean of its divisors is an integer number (150738744).

Almost surely, 2^1200112101 is an apocalyptic number.

It is an amenable number.

1200112101 is a deficient number, since it is larger than the sum of its proper divisors (608752827).

1200112101 is a wasteful number, since it uses less digits than its factorization.

1200112101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5797672 (or 5797669 counting only the distinct ones).

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

The square root of 1200112101 is about 34642.6341521542. The cubic root of 1200112101 is about 1062.6916584546.

Adding to 1200112101 its reverse (1012110021), we get a palindrome (2212222122).

The spelling of 1200112101 in words is "one billion, two hundred million, one hundred twelve thousand, one hundred one".