1200100001012 has 48 divisors (see below), whose sum is σ = 2470505849280. Its totient is φ = 504184838400.

The previous prime is 1200100001011. The next prime is 1200100001047. The reversal of 1200100001012 is 2101000010021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200100001011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17472143 + ... + 17540694.

It is an arithmetic number, because the mean of its divisors is an integer number (51468871860).

Almost surely, 2^{1200100001012} is an apocalyptic number.

It is an amenable number.

1200100001012 is an abundant number, since it is smaller than the sum of its proper divisors (1270405848268).

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

1200100001012 is a wasteful number, since it uses less digits than its factorization.

1200100001012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35012912 (or 35012910 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 1200100001012 its reverse (2101000010021), we get a palindrome (3301100011033).

Subtracting 1200100001012 from its reverse (2101000010021), we obtain a palindrome (900900009009).

The spelling of 1200100001012 in words is "one trillion, two hundred billion, one hundred million, one thousand, twelve".