1101201221111 has 4 divisors (see below), whose sum is σ = 1105588477224. Its totient is φ = 1096813965000.

The previous prime is 1101201221083. The next prime is 1101201221161. The reversal of 1101201221111 is 1111221021011.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1101201221111 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 (1101201221161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2193627680 + ... + 2193628181.

It is an arithmetic number, because the mean of its divisors is an integer number (276397119306).

Almost surely, 2^{1101201221111} is an apocalyptic number.

1101201221111 is a deficient number, since it is larger than the sum of its proper divisors (4387256113).

1101201221111 is an equidigital number, since it uses as much as digits as its factorization.

1101201221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4387256112.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1101201221111 its reverse (1111221021011), we get a palindrome (2212422242122).

The spelling of 1101201221111 in words is "one trillion, one hundred one billion, two hundred one million, two hundred twenty-one thousand, one hundred eleven".