21003333103221 has 16 divisors (see below), whose sum is σ = 32008386658944. Its totient is φ = 12000664263744.

The previous prime is 21003333103211. The next prime is 21003333103223. The reversal of 21003333103221 is 12230133330012.

It is not a de Polignac number, because 21003333103221 - 2¹⁴ = 21003333086837 is a prime.

It is a super-2 number, since 2×21003333103221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21003333103191 and 21003333103200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21003333103223) 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 15 ways as a sum of consecutive naturals, for example, 51473890 + ... + 51880323.

It is an arithmetic number, because the mean of its divisors is an integer number (2000524166184).

Almost surely, 2^{21003333103221} is an apocalyptic number.

21003333103221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21003333103221 is a deficient number, since it is larger than the sum of its proper divisors (11005053555723).

21003333103221 is a wasteful number, since it uses less digits than its factorization.

21003333103221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103363900.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 21003333103221 its reverse (12230133330012), we get a palindrome (33233466433233).

The spelling of 21003333103221 in words is "twenty-one trillion, three billion, three hundred thirty-three million, one hundred three thousand, two hundred twenty-one".