1101221101111 has 16 divisors (see below), whose sum is σ = 1129040640000. Its totient is φ = 1073777829696.

The previous prime is 1101221101087. The next prime is 1101221101159. The reversal of 1101221101111 is 1111011221011.

It is a cyclic number.

It is not a de Polignac number, because 1101221101111 - 2⁹ = 1101221100599 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1101221101091 and 1101221101100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101221101181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5805670 + ... + 5992348.

It is an arithmetic number, because the mean of its divisors is an integer number (70565040000).

Almost surely, 2^{1101221101111} is an apocalyptic number.

1101221101111 is a deficient number, since it is larger than the sum of its proper divisors (27819538889).

1101221101111 is an equidigital number, since it uses as much as digits as its factorization.

1101221101111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187686.

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

Adding to 1101221101111 its reverse (1111011221011), we get a palindrome (2212232322122).

The spelling of 1101221101111 in words is "one trillion, one hundred one billion, two hundred twenty-one million, one hundred one thousand, one hundred eleven".