21003140550103 has 8 divisors (see below), whose sum is σ = 21291926760000. Its totient is φ = 20714383312128.

The previous prime is 21003140550097. The next prime is 21003140550109. The reversal of 21003140550103 is 30105504130012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21003140550097) and next prime (21003140550109).

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 21003140550103 - 2¹⁷ = 21003140419031 is a prime.

It is a super-2 number, since 2×21003140550103² (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 (21003140550109) 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, 5781103 + ... + 8684896.

It is an arithmetic number, because the mean of its divisors is an integer number (2661490845000).

Almost surely, 2^{21003140550103} is an apocalyptic number.

21003140550103 is a deficient number, since it is larger than the sum of its proper divisors (288786209897).

21003140550103 is a wasteful number, since it uses less digits than its factorization.

21003140550103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14485961.

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 21003140550103 its reverse (30105504130012), we get a palindrome (51108644680115).

The spelling of 21003140550103 in words is "twenty-one trillion, three billion, one hundred forty million, five hundred fifty thousand, one hundred three".