1110121012221 has 32 divisors (see below), whose sum is σ = 1690513050240. Its totient is φ = 641927061504.

The previous prime is 1110121012219. The next prime is 1110121012249. The reversal of 1110121012221 is 1222101210111.

It is a happy number.

It is not a de Polignac number, because 1110121012221 - 2¹ = 1110121012219 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1110121012221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1110121012201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 942100 + ... + 1762893.

It is an arithmetic number, because the mean of its divisors is an integer number (52828532820).

Almost surely, 2^{1110121012221} is an apocalyptic number.

It is an amenable number.

1110121012221 is a deficient number, since it is larger than the sum of its proper divisors (580392038019).

1110121012221 is a wasteful number, since it uses less digits than its factorization.

1110121012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2705645.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1110121012221 its reverse (1222101210111), we get a palindrome (2332222222332).

The spelling of 1110121012221 in words is "one trillion, one hundred ten billion, one hundred twenty-one million, twelve thousand, two hundred twenty-one".