1200121210201 has 4 divisors (see below), whose sum is σ = 1200139800804. Its totient is φ = 1200102619600.

The previous prime is 1200121210181. The next prime is 1200121210213. The reversal of 1200121210201 is 1020121210021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 888730425625 + 311390784576 = 942725^2 + 558024^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200121210201 - 2²¹ = 1200119113049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200121210601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9198130 + ... + 9327691.

It is an arithmetic number, because the mean of its divisors is an integer number (300034950201).

Almost surely, 2^{1200121210201} is an apocalyptic number.

It is an amenable number.

1200121210201 is a deficient number, since it is larger than the sum of its proper divisors (18590603).

1200121210201 is an equidigital number, since it uses as much as digits as its factorization.

1200121210201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18590602.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1200121210201 its reverse (1020121210021), we get a palindrome (2220242420222).

The spelling of 1200121210201 in words is "one trillion, two hundred billion, one hundred twenty-one million, two hundred ten thousand, two hundred one".