1200221121201 has 4 divisors (see below), whose sum is σ = 1600294828272. Its totient is φ = 800147414132.

The previous prime is 1200221121173. The next prime is 1200221121217. The reversal of 1200221121201 is 1021211220021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1200221121201 - 2¹⁰ = 1200221120177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1200221121301) 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, 200036853531 + ... + 200036853536.

It is an arithmetic number, because the mean of its divisors is an integer number (400073707068).

Almost surely, 2^{1200221121201} is an apocalyptic number.

It is an amenable number.

1200221121201 is a deficient number, since it is larger than the sum of its proper divisors (400073707071).

1200221121201 is an equidigital number, since it uses as much as digits as its factorization.

1200221121201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400073707070.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1200221121201 its reverse (1021211220021), we get a palindrome (2221432341222).

The spelling of 1200221121201 in words is "one trillion, two hundred billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred one".