21103023103221 has 8 divisors (see below), whose sum is σ = 28141775099680. Its totient is φ = 14066476587792.

The previous prime is 21103023103147. The next prime is 21103023103271. The reversal of 21103023103221 is 12230132030112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21103023103221 - 2¹⁰ = 21103023102197 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 (21103023103271) 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, 551347930 + ... + 551386203.

It is an arithmetic number, because the mean of its divisors is an integer number (3517721887460).

Almost surely, 2^{21103023103221} is an apocalyptic number.

It is an amenable number.

21103023103221 is a deficient number, since it is larger than the sum of its proper divisors (7038751996459).

21103023103221 is a wasteful number, since it uses less digits than its factorization.

21103023103221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102740515.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21103023103221 its reverse (12230132030112), we get a palindrome (33333155133333).

The spelling of 21103023103221 in words is "twenty-one trillion, one hundred three billion, twenty-three million, one hundred three thousand, two hundred twenty-one".