20100120011003 has 4 divisors (see below), whose sum is σ = 20400121802280. Its totient is φ = 19800118219728.

The previous prime is 20100120010979. The next prime is 20100120011021. The reversal of 20100120011003 is 30011002100102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20100120011003 - 2⁶ = 20100120010939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20100120011903) 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 3 ways as a sum of consecutive naturals, for example, 150000895538 + ... + 150000895671.

It is an arithmetic number, because the mean of its divisors is an integer number (5100030450570).

Almost surely, 2^{20100120011003} is an apocalyptic number.

20100120011003 is a deficient number, since it is larger than the sum of its proper divisors (300001791277).

20100120011003 is an equidigital number, since it uses as much as digits as its factorization.

20100120011003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300001791276.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 20100120011003 its reverse (30011002100102), we get a palindrome (50111122111105).

The spelling of 20100120011003 in words is "twenty trillion, one hundred billion, one hundred twenty million, eleven thousand, three".