1200000012 has 24 divisors (see below), whose sum is σ = 2964706416. Its totient is φ = 376470528.

The previous prime is 1199999993. The next prime is 1200000041. The reversal of 1200000012 is 2100000021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (6).

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, 2940973 + ... + 2941380.

It is an arithmetic number, because the mean of its divisors is an integer number (123529434).

Almost surely, 2^1200000012 is an apocalyptic number.

1200000012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1200000012 is an abundant number, since it is smaller than the sum of its proper divisors (1764706404).

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

1200000012 is a wasteful number, since it uses less digits than its factorization.

1200000012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5882377 (or 5882375 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 1200000012 is about 34641.0163245826. The cubic root of 1200000012 is about 1062.6585727248.

Adding to 1200000012 its reverse (2100000021), we get a palindrome (3300000033).

Subtracting 1200000012 from its reverse (2100000021), we obtain a palindrome (900000009).

It can be divided in two parts, 12000000 and 12, that multiplied together give a square (144000000 = 12000²).

The spelling of 1200000012 in words is "one billion, two hundred million, twelve", and thus it is an aban number.