21103005403303 has 16 divisors (see below), whose sum is σ = 21261379932000. Its totient is φ = 20944860733440.

The previous prime is 21103005403199. The next prime is 21103005403307. The reversal of 21103005403303 is 30330450030112.

It is a cyclic number.

It is not a de Polignac number, because 21103005403303 - 2¹⁷ = 21103005272231 is a prime.

It is a super-2 number, since 2×21103005403303² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21103005403307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1330656388 + ... + 1330672246.

It is an arithmetic number, because the mean of its divisors is an integer number (1328836245750).

Almost surely, 2^{21103005403303} is an apocalyptic number.

21103005403303 is a deficient number, since it is larger than the sum of its proper divisors (158374528697).

21103005403303 is a wasteful number, since it uses less digits than its factorization.

21103005403303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22482.

The product of its (nonzero) digits is 3240, while the sum is 25.

Adding to 21103005403303 its reverse (30330450030112), we get a palindrome (51433455433415).

The spelling of 21103005403303 in words is "twenty-one trillion, one hundred three billion, five million, four hundred three thousand, three hundred three".