1101221201211 has 8 divisors (see below), whose sum is σ = 1502441328960. Its totient is φ = 717074270472.

The previous prime is 1101221201209. The next prime is 1101221201221. The reversal of 1101221201211 is 1121021221011.

It is a happy number.

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

It is not a de Polignac number, because 1101221201211 - 2¹ = 1101221201209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1101221201221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4268299101 + ... + 4268299358.

It is an arithmetic number, because the mean of its divisors is an integer number (187805166120).

Almost surely, 2^{1101221201211} is an apocalyptic number.

1101221201211 is a deficient number, since it is larger than the sum of its proper divisors (401220127749).

1101221201211 is an equidigital number, since it uses as much as digits as its factorization.

1101221201211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8536598505.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1101221201211 its reverse (1121021221011), we get a palindrome (2222242422222).

The spelling of 1101221201211 in words is "one trillion, one hundred one billion, two hundred twenty-one million, two hundred one thousand, two hundred eleven".