21001332002103 has 8 divisors (see below), whose sum is σ = 31113084447600. Its totient is φ = 14000888001384.

The previous prime is 21001332002099. The next prime is 21001332002107. The reversal of 21001332002103 is 30120023310012.

It is an interprime number because it is at equal distance from previous prime (21001332002099) and next prime (21001332002107).

It is not a de Polignac number, because 21001332002103 - 2² = 21001332002099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001332002107) 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 7 ways as a sum of consecutive naturals, for example, 388913555568 + ... + 388913555621.

It is an arithmetic number, because the mean of its divisors is an integer number (3889135555950).

Almost surely, 2^{21001332002103} is an apocalyptic number.

21001332002103 is a deficient number, since it is larger than the sum of its proper divisors (10111752445497).

21001332002103 is an equidigital number, since it uses as much as digits as its factorization.

21001332002103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777827111198 (or 777827111192 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21001332002103 its reverse (30120023310012), we get a palindrome (51121355312115).

The spelling of 21001332002103 in words is "twenty-one trillion, one billion, three hundred thirty-two million, two thousand, one hundred three".