1111221201111 has 8 divisors (see below), whose sum is σ = 1693289449344. Its totient is φ = 634983543480.

The previous prime is 1111221201089. The next prime is 1111221201127. The reversal of 1111221201111 is 1111021221111.

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

It is not a de Polignac number, because 1111221201111 - 2⁶ = 1111221201047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111221201151) 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, 26457647625 + ... + 26457647666.

It is an arithmetic number, because the mean of its divisors is an integer number (211661181168).

Almost surely, 2^{1111221201111} is an apocalyptic number.

1111221201111 is a deficient number, since it is larger than the sum of its proper divisors (582068248233).

1111221201111 is an equidigital number, since it uses as much as digits as its factorization.

1111221201111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52915295301.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 1111221201111 its reverse (1111021221111), we get a palindrome (2222242422222).

The spelling of 1111221201111 in words is "one trillion, one hundred eleven billion, two hundred twenty-one million, two hundred one thousand, one hundred eleven".