1201221121201 has 4 divisors (see below), whose sum is σ = 1271881187172. Its totient is φ = 1130561055232.

The previous prime is 1201221121189. The next prime is 1201221121223. The reversal of 1201221121201 is 1021211221021.

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 705640320576 + 495580800625 = 840024^2 + 703975^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201221121201 - 2⁹ = 1201221120689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201221121291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35330032960 + ... + 35330032993.

It is an arithmetic number, because the mean of its divisors is an integer number (317970296793).

Almost surely, 2^{1201221121201} is an apocalyptic number.

It is an amenable number.

1201221121201 is a deficient number, since it is larger than the sum of its proper divisors (70660065971).

1201221121201 is an equidigital number, since it uses as much as digits as its factorization.

1201221121201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70660065970.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1201221121201 its reverse (1021211221021), we get a palindrome (2222432342222).

The spelling of 1201221121201 in words is "one trillion, two hundred one billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred one".