21033010103 has 16 divisors (see below), whose sum is σ = 24159711744. Its totient is φ = 17936964000.

The previous prime is 21033010057. The next prime is 21033010157. The reversal of 21033010103 is 30101033012.

It is a cyclic number.

It is not a de Polignac number, because 21033010103 - 2¹⁰ = 21033009079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033019103) 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, 1745726 + ... + 1757732.

It is an arithmetic number, because the mean of its divisors is an integer number (1509981984).

Almost surely, 2^21033010103 is an apocalyptic number.

21033010103 is a deficient number, since it is larger than the sum of its proper divisors (3126701641).

21033010103 is a wasteful number, since it uses less digits than its factorization.

21033010103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13262.

The product of its (nonzero) digits is 54, while the sum is 14.

Adding to 21033010103 its reverse (30101033012), we get a palindrome (51134043115).

The spelling of 21033010103 in words is "twenty-one billion, thirty-three million, ten thousand, one hundred three".