11101111002221 has 8 divisors (see below), whose sum is σ = 11212213956888. Its totient is φ = 10990031400000.

The previous prime is 11101111002211. The next prime is 11101111002227. The reversal of 11101111002221 is 12220011110111.

It can be written as a sum of positive squares in 4 ways, for example, as 568561240900 + 10532549761321 = 754030^2 + 3245389^2 .

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 11101111002221 - 2¹⁴ = 11101110985837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11101111002196 and 11101111002205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101111002227) 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, 4881830 + ... + 6784871.

It is an arithmetic number, because the mean of its divisors is an integer number (1401526744611).

Almost surely, 2^{11101111002221} is an apocalyptic number.

It is an amenable number.

11101111002221 is a deficient number, since it is larger than the sum of its proper divisors (111102954667).

11101111002221 is a wasteful number, since it uses less digits than its factorization.

11101111002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11676223.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 11101111002221 its reverse (12220011110111), we get a palindrome (23321122112332).

The spelling of 11101111002221 in words is "eleven trillion, one hundred one billion, one hundred eleven million, two thousand, two hundred twenty-one".