21010033021103 has 64 divisors (see below), whose sum is σ = 27439592140800. Its totient is φ = 15651361935360.

The previous prime is 21010033021067. The next prime is 21010033021139. The reversal of 21010033021103 is 30112033001012.

It is an interprime number because it is at equal distance from previous prime (21010033021067) and next prime (21010033021139).

It is a cyclic number.

It is not a de Polignac number, because 21010033021103 - 2⁶ = 21010033021039 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010033021183) 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 63 ways as a sum of consecutive naturals, for example, 102703226 + ... + 102907592.

It is an arithmetic number, because the mean of its divisors is an integer number (428743627200).

Almost surely, 2^{21010033021103} is an apocalyptic number.

21010033021103 is a deficient number, since it is larger than the sum of its proper divisors (6429559119697).

21010033021103 is a wasteful number, since it uses less digits than its factorization.

21010033021103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205560.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21010033021103 its reverse (30112033001012), we get a palindrome (51122066022115).

The spelling of 21010033021103 in words is "twenty-one trillion, ten billion, thirty-three million, twenty-one thousand, one hundred three".