1200120000001 has 8 divisors (see below), whose sum is σ = 1292483814440. Its totient is φ = 1107762884352.

The previous prime is 1200119999987. The next prime is 1200120000043. The reversal of 1200120000001 is 1000000210021.

It can be written as a sum of positive squares in 4 ways, for example, as 1313990001 + 1198806010000 = 36249^2 + 1094900^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1200120000001 - 2³⁹ = 650364186113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1200120000901) 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, 1299486 + ... + 2022103.

It is an arithmetic number, because the mean of its divisors is an integer number (161560476805).

Almost surely, 2^{1200120000001} is an apocalyptic number.

It is an amenable number.

1200120000001 is a deficient number, since it is larger than the sum of its proper divisors (92363814439).

1200120000001 is a wasteful number, since it uses less digits than its factorization.

1200120000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3349395.

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

Adding to 1200120000001 its reverse (1000000210021), we get a palindrome (2200120210022).

The spelling of 1200120000001 in words is "one trillion, two hundred billion, one hundred twenty million, one", and thus it is an aban number.