11101101221 has 16 divisors (see below), whose sum is σ = 12961406976. Its totient is φ = 9309545136.

The previous prime is 11101101217. The next prime is 11101101227. The reversal of 11101101221 is 12210110111.

It is a cyclic number.

It is not a de Polignac number, because 11101101221 - 2² = 11101101217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101101227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1676900 + ... + 1683506.

It is an arithmetic number, because the mean of its divisors is an integer number (810087936).

Almost surely, 2^11101101221 is an apocalyptic number.

It is an amenable number.

11101101221 is a deficient number, since it is larger than the sum of its proper divisors (1860305755).

11101101221 is an equidigital number, since it uses as much as digits as its factorization.

11101101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11768.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 11101101221 its reverse (12210110111), we get a palindrome (23311211332).

The spelling of 11101101221 in words is "eleven billion, one hundred one million, one hundred one thousand, two hundred twenty-one".