2121020011003 has 4 divisors (see below), whose sum is σ = 2130363711720. Its totient is φ = 2111676310288.

The previous prime is 2121020010979. The next prime is 2121020011007. The reversal of 2121020011003 is 3001100201212.

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 2121020011003 - 2³⁷ = 1983581057531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121020011007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4671850018 + ... + 4671850471.

It is an arithmetic number, because the mean of its divisors is an integer number (532590927930).

Almost surely, 2^{2121020011003} is an apocalyptic number.

2121020011003 is a deficient number, since it is larger than the sum of its proper divisors (9343700717).

2121020011003 is an equidigital number, since it uses as much as digits as its factorization.

2121020011003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9343700716.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 2121020011003 its reverse (3001100201212), we get a palindrome (5122120212215).

The spelling of 2121020011003 in words is "two trillion, one hundred twenty-one billion, twenty million, eleven thousand, three".