11112221120221 has 8 divisors (see below), whose sum is σ = 12033862152480. Its totient is φ = 10200130772592.

The previous prime is 11112221120207. The next prime is 11112221120227. The reversal of 11112221120221 is 12202112221111.

It is a happy number.

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 11112221120221 - 2³³ = 11103631185629 is a prime.

It is a super-2 number, since 2×11112221120221² (a number of 27 digits) contains 22 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 (11112221120227) 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, 2387668735 + ... + 2387673388.

It is an arithmetic number, because the mean of its divisors is an integer number (1504232769060).

Almost surely, 2^{11112221120221} is an apocalyptic number.

It is an amenable number.

11112221120221 is a deficient number, since it is larger than the sum of its proper divisors (921641032259).

11112221120221 is a wasteful number, since it uses less digits than its factorization.

11112221120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4775342315.

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

Adding to 11112221120221 its reverse (12202112221111), we get a palindrome (23314333341332).

The spelling of 11112221120221 in words is "eleven trillion, one hundred twelve billion, two hundred twenty-one million, one hundred twenty thousand, two hundred twenty-one".