111022121000221 has 4 divisors (see below), whose sum is σ = 117552834000252. Its totient is φ = 104491408000192.

The previous prime is 111022121000207. The next prime is 111022121000267. The reversal of 111022121000221 is 122000121220111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55288221716025 + 55733899284196 = 7435605^2 + 7465514^2 .

It is not a de Polignac number, because 111022121000221 - 2¹⁵ = 111022120967453 is a prime.

It is a super-2 number, since 2×111022121000221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111022121000195 and 111022121000204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111022121000321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3265356499990 + ... + 3265356500023.

It is an arithmetic number, because the mean of its divisors is an integer number (29388208500063).

Almost surely, 2^{111022121000221} is an apocalyptic number.

It is an amenable number.

111022121000221 is a deficient number, since it is larger than the sum of its proper divisors (6530713000031).

111022121000221 is an equidigital number, since it uses as much as digits as its factorization.

111022121000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6530713000030.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111022121000221 its reverse (122000121220111), we get a palindrome (233022242220332).

The spelling of 111022121000221 in words is "one hundred eleven trillion, twenty-two billion, one hundred twenty-one million, two hundred twenty-one", and thus it is an aban number.