111221120221 has 8 divisors (see below), whose sum is σ = 112803451200. Its totient is φ = 109639229280.

The previous prime is 111221120207. The next prime is 111221120299. The reversal of 111221120221 is 122021122111.

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 111221120221 - 2²⁵ = 111187565789 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111221120195 and 111221120204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221120321) 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, 416910 + ... + 629488.

It is an arithmetic number, because the mean of its divisors is an integer number (14100431400).

Almost surely, 2^111221120221 is an apocalyptic number.

It is an amenable number.

111221120221 is a deficient number, since it is larger than the sum of its proper divisors (1582330979).

111221120221 is an equidigital number, since it uses as much as digits as its factorization.

111221120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220019.

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

Adding to 111221120221 its reverse (122021122111), we get a palindrome (233242242332).

The spelling of 111221120221 in words is "one hundred eleven billion, two hundred twenty-one million, one hundred twenty thousand, two hundred twenty-one".