20110121001003 has 8 divisors (see below), whose sum is σ = 29251085092416. Its totient is φ = 12187952121800.

The previous prime is 20110121000947. The next prime is 20110121001011. The reversal of 20110121001003 is 30010012101102.

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 20110121001003 - 2¹⁰ = 20110120999979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20110121001003.

It is not an unprimeable number, because it can be changed into a prime (20110121001703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304698803013 + ... + 304698803078.

It is an arithmetic number, because the mean of its divisors is an integer number (3656385636552).

Almost surely, 2^{20110121001003} is an apocalyptic number.

20110121001003 is a deficient number, since it is larger than the sum of its proper divisors (9140964091413).

20110121001003 is a wasteful number, since it uses less digits than its factorization.

20110121001003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609397606105.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 20110121001003 its reverse (30010012101102), we get a palindrome (50120133102105).

The spelling of 20110121001003 in words is "twenty trillion, one hundred ten billion, one hundred twenty-one million, one thousand, three".