11121221101211 has 24 divisors (see below), whose sum is σ = 12431514047616. Its totient is φ = 9934157675520.

The previous prime is 11121221101169. The next prime is 11121221101259. The reversal of 11121221101211 is 11210112212111.

It is not a de Polignac number, because 11121221101211 - 2²² = 11121216906907 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11121221101211.

It is not an unprimeable number, because it can be changed into a prime (11121221103211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 228464171 + ... + 228512843.

It is an arithmetic number, because the mean of its divisors is an integer number (517979751984).

Almost surely, 2^{11121221101211} is an apocalyptic number.

11121221101211 is a deficient number, since it is larger than the sum of its proper divisors (1310292946405).

11121221101211 is a wasteful number, since it uses less digits than its factorization.

11121221101211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92343 (or 92330 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 11121221101211 its reverse (11210112212111), we get a palindrome (22331333313322).

The spelling of 11121221101211 in words is "eleven trillion, one hundred twenty-one billion, two hundred twenty-one million, one hundred one thousand, two hundred eleven".