11101221021221 has 8 divisors (see below), whose sum is σ = 11259363333888. Its totient is φ = 10943128350000.

The previous prime is 11101221021203. The next prime is 11101221021223. The reversal of 11101221021221 is 12212012210111.

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

It is a cyclic number.

It is not a de Polignac number, because 11101221021221 - 2²⁶ = 11101153912357 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 11101221021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101221021223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11959805 + ... + 12854546.

It is an arithmetic number, because the mean of its divisors is an integer number (1407420416736).

Almost surely, 2^{11101221021221} is an apocalyptic number.

It is an amenable number.

11101221021221 is a deficient number, since it is larger than the sum of its proper divisors (158142312667).

11101221021221 is an equidigital number, since it uses as much as digits as its factorization.

11101221021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24820723.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11101221021221 its reverse (12212012210111), we get a palindrome (23313233231332).

The spelling of 11101221021221 in words is "eleven trillion, one hundred one billion, two hundred twenty-one million, twenty-one thousand, two hundred twenty-one".