1111221111101 has 4 divisors (see below), whose sum is σ = 1111569350304. Its totient is φ = 1110872871900.

The previous prime is 1111221111097. The next prime is 1111221111151. The reversal of 1111221111101 is 1011111221111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1111221111101 - 2² = 1111221111097 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 (1111221111151) 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, 174114815 + ... + 174121196.

It is an arithmetic number, because the mean of its divisors is an integer number (277892337576).

Almost surely, 2^{1111221111101} is an apocalyptic number.

It is an amenable number.

1111221111101 is a deficient number, since it is larger than the sum of its proper divisors (348239203).

1111221111101 is an equidigital number, since it uses as much as digits as its factorization.

1111221111101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348239202.

The product of its (nonzero) digits is 4, while the sum is 14.

Adding to 1111221111101 its reverse (1011111221111), we get a palindrome (2122332332212).

It can be divided in two parts, 1111221111 and 101, that multiplied together give a palindrome (112233332211).

The spelling of 1111221111101 in words is "one trillion, one hundred eleven billion, two hundred twenty-one million, one hundred eleven thousand, one hundred one".