11101221021211 has 4 divisors (see below), whose sum is σ = 11132143642800. Its totient is φ = 11070298399624.

The previous prime is 11101221021203. The next prime is 11101221021223. The reversal of 11101221021211 is 11212012210111.

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 11101221021211 - 2³ = 11101221021203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11101221021251) 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, 15461310256 + ... + 15461310973.

It is an arithmetic number, because the mean of its divisors is an integer number (2783035910700).

Almost surely, 2^{11101221021211} is an apocalyptic number.

11101221021211 is a deficient number, since it is larger than the sum of its proper divisors (30922621589).

11101221021211 is an equidigital number, since it uses as much as digits as its factorization.

11101221021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30922621588.

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

Adding to 11101221021211 its reverse (11212012210111), we get a palindrome (22313233231322).

The spelling of 11101221021211 in words is "eleven trillion, one hundred one billion, two hundred twenty-one million, twenty-one thousand, two hundred eleven".