21001002310103 has 16 divisors (see below), whose sum is σ = 21934914656256. Its totient is φ = 20068828977120.

The previous prime is 21001002310087. The next prime is 21001002310129. The reversal of 21001002310103 is 30101320010012.

It is a cyclic number.

It is not a de Polignac number, because 21001002310103 - 2⁴ = 21001002310087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001002310903) 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 15 ways as a sum of consecutive naturals, for example, 305359226 + ... + 305427992.

It is an arithmetic number, because the mean of its divisors is an integer number (1370932166016).

Almost surely, 2^{21001002310103} is an apocalyptic number.

21001002310103 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21001002310103 is a deficient number, since it is larger than the sum of its proper divisors (933912346153).

21001002310103 is a wasteful number, since it uses less digits than its factorization.

21001002310103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81214.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21001002310103 its reverse (30101320010012), we get a palindrome (51102322320115).

The spelling of 21001002310103 in words is "twenty-one trillion, one billion, two million, three hundred ten thousand, one hundred three".