21001303100103 has 8 divisors (see below), whose sum is σ = 28005061938048. Its totient is φ = 13999206497784.

The previous prime is 21001303100021. The next prime is 21001303100179. The reversal of 21001303100103 is 30100130310012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21001303100103 - 2²⁸ = 21001034664647 is a prime.

It is a super-2 number, since 2×21001303100103² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001303100003) 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, 415529425 + ... + 415579962.

It is an arithmetic number, because the mean of its divisors is an integer number (3500632742256).

Almost surely, 2^{21001303100103} is an apocalyptic number.

21001303100103 is a deficient number, since it is larger than the sum of its proper divisors (7003758837945).

21001303100103 is an equidigital number, since it uses as much as digits as its factorization.

21001303100103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831117813.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 21001303100103 its reverse (30100130310012), we get a palindrome (51101433410115).

The spelling of 21001303100103 in words is "twenty-one trillion, one billion, three hundred three million, one hundred thousand, one hundred three".