1121103120221 has 16 divisors (see below), whose sum is σ = 1282237737984. Its totient is φ = 960213007104.

The previous prime is 1121103120199. The next prime is 1121103120227. The reversal of 1121103120221 is 1220213011211.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1121103120221 - 2⁶ = 1121103120157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1121103120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121103120227) 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, 111692015 + ... + 111702051.

It is an arithmetic number, because the mean of its divisors is an integer number (80139858624).

Almost surely, 2^{1121103120221} is an apocalyptic number.

It is an amenable number.

1121103120221 is a deficient number, since it is larger than the sum of its proper divisors (161134617763).

1121103120221 is a wasteful number, since it uses less digits than its factorization.

1121103120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20620.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1121103120221 its reverse (1220213011211), we get a palindrome (2341316131432).

The spelling of 1121103120221 in words is "one trillion, one hundred twenty-one billion, one hundred three million, one hundred twenty thousand, two hundred twenty-one".