1200201111 has 64 divisors (see below), whose sum is σ = 1904394240. Its totient is φ = 745446240.

The previous prime is 1200201097. The next prime is 1200201113. The reversal of 1200201111 is 1111020021.

It is a happy number.

It is not a de Polignac number, because 1200201111 - 2¹⁸ = 1199938967 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 = 1200201093 and 1200201102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200201113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7186750 + ... + 7186916.

It is an arithmetic number, because the mean of its divisors is an integer number (29756160).

Almost surely, 2^1200201111 is an apocalyptic number.

1200201111 is a deficient number, since it is larger than the sum of its proper divisors (704193129).

1200201111 is a wasteful number, since it uses less digits than its factorization.

1200201111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433 (or 427 counting only the distinct ones).

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

The square root of 1200201111 is about 34643.9188170161. The cubic root of 1200201111 is about 1062.7179304020.

Adding to 1200201111 its reverse (1111020021), we get a palindrome (2311221132).

The spelling of 1200201111 in words is "one billion, two hundred million, two hundred one thousand, one hundred eleven".