1200012112 has 40 divisors (see below), whose sum is σ = 2590224840. Its totient is φ = 534750720.

The previous prime is 1200012101. The next prime is 1200012173. The reversal of 1200012112 is 2112100021.

It can be written as a sum of positive squares in 4 ways, for example, as 372644416 + 827367696 = 19304^2 + 28764^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93439 + ... + 105502.

It is an arithmetic number, because the mean of its divisors is an integer number (64755621).

Almost surely, 2^1200012112 is an apocalyptic number.

It is an amenable number.

1200012112 is an abundant number, since it is smaller than the sum of its proper divisors (1390212728).

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

1200012112 is a wasteful number, since it uses less digits than its factorization.

1200012112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198991 (or 198985 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1200012112 is about 34641.1909725979. The cubic root of 1200012112 is about 1062.6621444263.

Adding to 1200012112 its reverse (2112100021), we get a palindrome (3312112133).

The spelling of 1200012112 in words is "one billion, two hundred million, twelve thousand, one hundred twelve".