1200111012 has 96 divisors (see below), whose sum is σ = 3215842560. Its totient is φ = 386830080.

The previous prime is 1200111007. The next prime is 1200111013. The reversal of 1200111012 is 2101110021.

It is a happy number.

It is a super-2 number, since 2×1200111012² = 2880532882247328288, which contains 22 as substring.

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 = 1200110985 and 1200111003.

It is not an unprimeable number, because it can be changed into a prime (1200111013) 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, 404928 + ... + 407880.

It is an arithmetic number, because the mean of its divisors is an integer number (33498360).

Almost surely, 2^1200111012 is an apocalyptic number.

1200111012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1200111012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1607921280).

1200111012 is an abundant number, since it is smaller than the sum of its proper divisors (2015731548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1200111012 is a wasteful number, since it uses less digits than its factorization.

1200111012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3090 (or 3082 counting only the distinct ones).

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

The square root of 1200111012 is about 34642.6184345237. The cubic root of 1200111012 is about 1062.6913370203.

Adding to 1200111012 its reverse (2101110021), we get a palindrome (3301221033).

Subtracting 1200111012 from its reverse (2101110021), we obtain a palindrome (900999009).

The spelling of 1200111012 in words is "one billion, two hundred million, one hundred eleven thousand, twelve".