1111112201221 has 8 divisors (see below), whose sum is σ = 1212199293024. Its totient is φ = 1010037924720.

The previous prime is 1111112201189. The next prime is 1111112201257. The reversal of 1111112201221 is 1221022111111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1111112201221 - 2⁵ = 1111112201189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111112201195 and 1111112201204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111112201281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3022086 + ... + 3369751.

It is an arithmetic number, because the mean of its divisors is an integer number (151524911628).

Almost surely, 2^{1111112201221} is an apocalyptic number.

1111112201221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1111112201221 is a deficient number, since it is larger than the sum of its proper divisors (101087091803).

1111112201221 is a wasteful number, since it uses less digits than its factorization.

1111112201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6407651.

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

Adding to 1111112201221 its reverse (1221022111111), we get a palindrome (2332134312332).

The spelling of 1111112201221 in words is "one trillion, one hundred eleven billion, one hundred twelve million, two hundred one thousand, two hundred twenty-one".