21003001102003 has 8 divisors (see below), whose sum is σ = 22488342225840. Its totient is φ = 19545423363840.

The previous prime is 21003001101917. The next prime is 21003001102007. The reversal of 21003001102003 is 30020110030012.

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 21003001102003 - 2⁹ = 21003001101491 is a prime.

It is a super-2 number, since 2×21003001102003² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21003001102007) 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, 6940844853 + ... + 6940847878.

It is an arithmetic number, because the mean of its divisors is an integer number (2811042778230).

Almost surely, 2^{21003001102003} is an apocalyptic number.

21003001102003 is a deficient number, since it is larger than the sum of its proper divisors (1485341123837).

21003001102003 is a wasteful number, since it uses less digits than its factorization.

21003001102003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13881692837.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21003001102003 its reverse (30020110030012), we get a palindrome (51023111132015).

The spelling of 21003001102003 in words is "twenty-one trillion, three billion, one million, one hundred two thousand, three".