1101111221101 has 4 divisors (see below), whose sum is σ = 1121886904572. Its totient is φ = 1080335537632.

The previous prime is 1101111221069. The next prime is 1101111221113. The reversal of 1101111221101 is 1011221111011.

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 447440588100 + 653670633001 = 668910^2 + 808499^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101111221101 - 2⁵ = 1101111221069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101111221131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10387841656 + ... + 10387841761.

It is an arithmetic number, because the mean of its divisors is an integer number (280471726143).

Almost surely, 2^{1101111221101} is an apocalyptic number.

It is an amenable number.

1101111221101 is a deficient number, since it is larger than the sum of its proper divisors (20775683471).

1101111221101 is an equidigital number, since it uses as much as digits as its factorization.

1101111221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20775683470.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 1101111221101 its reverse (1011221111011), we get a palindrome (2112332332112).

The spelling of 1101111221101 in words is "one trillion, one hundred one billion, one hundred eleven million, two hundred twenty-one thousand, one hundred one".