1200112011 has 32 divisors (see below), whose sum is σ = 2036436480. Its totient is φ = 684259488.

The previous prime is 1200112003. The next prime is 1200112037. The reversal of 1200112011 is 1102110021.

It is a happy number.

It is not a de Polignac number, because 1200112011 - 2³ = 1200112003 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 = 1200111984 and 1200112002.

It is not an unprimeable number, because it can be changed into a prime (1200112051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81465 + ... + 95061.

It is an arithmetic number, because the mean of its divisors is an integer number (63638640).

Almost surely, 2^1200112011 is an apocalyptic number.

1200112011 is a deficient number, since it is larger than the sum of its proper divisors (836324469).

1200112011 is a wasteful number, since it uses less digits than its factorization.

1200112011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14080 (or 14074 counting only the distinct ones).

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

The square root of 1200112011 is about 34642.6328531767. The cubic root of 1200112011 is about 1062.6916318897.

Adding to 1200112011 its reverse (1102110021), we get a palindrome (2302222032).

The spelling of 1200112011 in words is "one billion, two hundred million, one hundred twelve thousand, eleven".