111221222210111 has 4 divisors (see below), whose sum is σ = 119776700841672. Its totient is φ = 102665743578552.

The previous prime is 111221222210099. The next prime is 111221222210179. The reversal of 111221222210111 is 111012222122111.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 111221222210111 - 2²² = 111221218015807 is a prime.

It is a super-3 number, since 3×111221222210111³ (a number of 43 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 (111221222210411) 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, 4277739315761 + ... + 4277739315786.

It is an arithmetic number, because the mean of its divisors is an integer number (29944175210418).

Almost surely, 2^{111221222210111} is an apocalyptic number.

111221222210111 is a deficient number, since it is larger than the sum of its proper divisors (8555478631561).

111221222210111 is an equidigital number, since it uses as much as digits as its factorization.

111221222210111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8555478631560.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 111221222210111 its reverse (111012222122111), we get a palindrome (222233444332222).

The spelling of 111221222210111 in words is "one hundred eleven trillion, two hundred twenty-one billion, two hundred twenty-two million, two hundred ten thousand, one hundred eleven".