1200200001012 has 18 divisors (see below), whose sum is σ = 3033838891538. Its totient is φ = 400066666992.

The previous prime is 1200200001001. The next prime is 1200200001023. The reversal of 1200200001012 is 2101000020021.

It is an interprime number because it is at equal distance from previous prime (1200200001001) and next prime (1200200001023).

It can be written as a sum of positive squares in only one way, i.e., 832192764516 + 368007236496 = 912246^2 + 606636^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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 = 1200200000985 and 1200200001003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16669444423 + ... + 16669444494.

Almost surely, 2^{1200200001012} is an apocalyptic number.

1200200001012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1200200001012 is an abundant number, since it is smaller than the sum of its proper divisors (1833638890526).

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

1200200001012 is a wasteful number, since it uses less digits than its factorization.

1200200001012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33338888927 (or 33338888922 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 1200200001012 its reverse (2101000020021), we get a palindrome (3301200021033).

The spelling of 1200200001012 in words is "one trillion, two hundred billion, two hundred million, one thousand, twelve".