11110211222221 has 8 divisors (see below), whose sum is σ = 11262463755840. Its totient is φ = 10957960252512.

The previous prime is 11110211222203. The next prime is 11110211222233. The reversal of 11110211222221 is 12222211201111.

It is a happy number.

11110211222221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11110211222221 - 2²⁵ = 11110177667789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11110211222291) 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, 26483526 + ... + 26899768.

It is an arithmetic number, because the mean of its divisors is an integer number (1407807969480).

Almost surely, 2^{11110211222221} is an apocalyptic number.

It is an amenable number.

11110211222221 is a deficient number, since it is larger than the sum of its proper divisors (152252533619).

11110211222221 is an equidigital number, since it uses as much as digits as its factorization.

11110211222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781955.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 11110211222221 its reverse (12222211201111), we get a palindrome (23332422423332).

The spelling of 11110211222221 in words is "eleven trillion, one hundred ten billion, two hundred eleven million, two hundred twenty-two thousand, two hundred twenty-one".