21021010002103 has 8 divisors (see below), whose sum is σ = 21079980572672. Its totient is φ = 20962048631256.

The previous prime is 21021010002079. The next prime is 21021010002211. The reversal of 21021010002103 is 30120001012012.

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 21021010002103 - 2²⁹ = 21020473131191 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 (21021010002403) 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, 2289226 + ... + 6876232.

It is an arithmetic number, because the mean of its divisors is an integer number (2634997571584).

Almost surely, 2^{21021010002103} is an apocalyptic number.

21021010002103 is a deficient number, since it is larger than the sum of its proper divisors (58970570569).

21021010002103 is a wasteful number, since it uses less digits than its factorization.

21021010002103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4599861.

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

Adding to 21021010002103 its reverse (30120001012012), we get a palindrome (51141011014115).

The spelling of 21021010002103 in words is "twenty-one trillion, twenty-one billion, ten million, two thousand, one hundred three".