1200100012 has 24 divisors (see below), whose sum is σ = 2156031360. Its totient is φ = 584154240.

The previous prime is 1200099961. The next prime is 1200100019. The reversal of 1200100012 is 2100010021.

It is a junction number, because it is equal to n+sod(n) for n = 1200099968 and 1200100004.

It is not an unprimeable number, because it can be changed into a prime (1200100019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70918 + ... + 86194.

It is an arithmetic number, because the mean of its divisors is an integer number (89834640).

Almost surely, 2^1200100012 is an apocalyptic number.

It is an amenable number.

1200100012 is a deficient number, since it is larger than the sum of its proper divisors (955931348).

1200100012 is a wasteful number, since it uses less digits than its factorization.

1200100012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15801 (or 15799 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 1200100012 is about 34642.4596701793. The cubic root of 1200100012 is about 1062.6880901983.

Adding to 1200100012 its reverse (2100010021), we get a palindrome (3300110033).

The spelling of 1200100012 in words is "one billion, two hundred million, one hundred thousand, twelve".