1110121221001 has 8 divisors (see below), whose sum is σ = 1215113771144. Its totient is φ = 1007928472320.

The previous prime is 1110121220993. The next prime is 1110121221017. The reversal of 1110121221001 is 1001221210111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2575461001 + 1107545760000 = 50749^2 + 1052400^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1110121221001 - 2³ = 1110121220993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (1110121221061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 699949536 + ... + 699951121.

It is an arithmetic number, because the mean of its divisors is an integer number (151889221393).

Almost surely, 2^{1110121221001} is an apocalyptic number.

It is an amenable number.

1110121221001 is a deficient number, since it is larger than the sum of its proper divisors (104992550143).

1110121221001 is a wasteful number, since it uses less digits than its factorization.

1110121221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1399900731.

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

Adding to 1110121221001 its reverse (1001221210111), we get a palindrome (2111342431112).

The spelling of 1110121221001 in words is "one trillion, one hundred ten billion, one hundred twenty-one million, two hundred twenty-one thousand, one".