21221101003 has 8 divisors (see below), whose sum is σ = 22533789600. Its totient is φ = 19915566720.

The previous prime is 21221100997. The next prime is 21221101019. The reversal of 21221101003 is 30010112212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21221101003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21221101063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1782463 + ... + 1794328.

It is an arithmetic number, because the mean of its divisors is an integer number (2816723700).

Almost surely, 2^21221101003 is an apocalyptic number.

21221101003 is a deficient number, since it is larger than the sum of its proper divisors (1312688597).

21221101003 is a wasteful number, since it uses less digits than its factorization.

21221101003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3577157.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21221101003 its reverse (30010112212), we get a palindrome (51231213215).

The spelling of 21221101003 in words is "twenty-one billion, two hundred twenty-one million, one hundred one thousand, three".