11113111022221 has 8 divisors (see below), whose sum is σ = 11997811022904. Its totient is φ = 10232674636800.

The previous prime is 11113111022203. The next prime is 11113111022243. The reversal of 11113111022221 is 12222011131111.

It can be written as a sum of positive squares in 4 ways, for example, as 4069341942121 + 7043769080100 = 2017261^2 + 2654010^2 .

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 11113111022221 - 2⁹ = 11113111021709 is a prime.

It is a super-3 number, since 3×11113111022221³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11113111082221) 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, 1065898396 + ... + 1065908821.

It is an arithmetic number, because the mean of its divisors is an integer number (1499726377863).

Almost surely, 2^{11113111022221} is an apocalyptic number.

It is an amenable number.

11113111022221 is a deficient number, since it is larger than the sum of its proper divisors (884700000683).

11113111022221 is a wasteful number, since it uses less digits than its factorization.

11113111022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2131807631.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 11113111022221 its reverse (12222011131111), we get a palindrome (23335122153332).

The spelling of 11113111022221 in words is "eleven trillion, one hundred thirteen billion, one hundred eleven million, twenty-two thousand, two hundred twenty-one".