1201221201211 has 4 divisors (see below), whose sum is σ = 1204785656152. Its totient is φ = 1197656746272.

The previous prime is 1201221201161. The next prime is 1201221201247. The reversal of 1201221201211 is 1121021221021.

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

It is a cyclic number.

It is not a de Polignac number, because 1201221201211 - 2²³ = 1201212812603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201221601211) 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, 1782226965 + ... + 1782227638.

It is an arithmetic number, because the mean of its divisors is an integer number (301196414038).

Almost surely, 2^{1201221201211} is an apocalyptic number.

1201221201211 is a deficient number, since it is larger than the sum of its proper divisors (3564454941).

1201221201211 is an equidigital number, since it uses as much as digits as its factorization.

1201221201211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3564454940.

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

Adding to 1201221201211 its reverse (1121021221021), we get a palindrome (2322242422232).

The spelling of 1201221201211 in words is "one trillion, two hundred one billion, two hundred twenty-one million, two hundred one thousand, two hundred eleven".