1200112001 has 12 divisors (see below), whose sum is σ = 1320485712. Its totient is φ = 1089891000.

The previous prime is 1200111977. The next prime is 1200112003. The reversal of 1200112001 is 1002110021.

It is not a de Polignac number, because 1200112001 - 2⁶ = 1200111937 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1200112001.

It is not an unprimeable number, because it can be changed into a prime (1200112003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 127466 + ... + 136556.

It is an arithmetic number, because the mean of its divisors is an integer number (110040476).

Almost surely, 2^1200112001 is an apocalyptic number.

1200112001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200112001 is a deficient number, since it is larger than the sum of its proper divisors (120373711).

1200112001 is a wasteful number, since it uses less digits than its factorization.

1200112001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10204 (or 10193 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1200112001 is about 34642.6327088459. The cubic root of 1200112001 is about 1062.6916289381.

Adding to 1200112001 its reverse (1002110021), we get a palindrome (2202222022).

The spelling of 1200112001 in words is "one billion, two hundred million, one hundred twelve thousand, one".