1100121110221 has 48 divisors (see below), whose sum is σ = 1315003450176. Its totient is φ = 917376413184.

The previous prime is 1100121110203. The next prime is 1100121110227. The reversal of 1100121110221 is 1220111210011.

It is a happy number.

It is not a de Polignac number, because 1100121110221 - 2⁷ = 1100121110093 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 (1100121110227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 118377051 + ... + 118386343.

It is an arithmetic number, because the mean of its divisors is an integer number (27395905212).

Almost surely, 2^{1100121110221} is an apocalyptic number.

It is an amenable number.

1100121110221 is a deficient number, since it is larger than the sum of its proper divisors (214882339955).

1100121110221 is a wasteful number, since it uses less digits than its factorization.

1100121110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9818 (or 9811 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1100121110221 its reverse (1220111210011), we get a palindrome (2320232320232).

The spelling of 1100121110221 in words is "one trillion, one hundred billion, one hundred twenty-one million, one hundred ten thousand, two hundred twenty-one".