1200111201 has 16 divisors (see below), whose sum is σ = 1779117120. Its totient is φ = 799545600.

The previous prime is 1200111197. The next prime is 1200111203. The reversal of 1200111201 is 1021110021.

It is a happy number.

It is not a de Polignac number, because 1200111201 - 2² = 1200111197 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1200111203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29346 + ... + 57108.

It is an arithmetic number, because the mean of its divisors is an integer number (111194820).

Almost surely, 2^1200111201 is an apocalyptic number.

It is an amenable number.

1200111201 is a deficient number, since it is larger than the sum of its proper divisors (579005919).

1200111201 is a wasteful number, since it uses less digits than its factorization.

1200111201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29373 (or 29367 counting only the distinct ones).

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

The square root of 1200111201 is about 34642.6211623774. The cubic root of 1200111201 is about 1062.6913928064.

Adding to 1200111201 its reverse (1021110021), we get a palindrome (2221221222).

The spelling of 1200111201 in words is "one billion, two hundred million, one hundred eleven thousand, two hundred one".