21021303005 has 8 divisors (see below), whose sum is σ = 25267680000. Its totient is φ = 16788964816.

The previous prime is 21021302971. The next prime is 21021303041. The reversal of 21021303005 is 50030312012.

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 21021303005 - 2¹⁰ = 21021301981 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3506405 + ... + 3512394.

It is an arithmetic number, because the mean of its divisors is an integer number (3158460000).

Almost surely, 2^21021303005 is an apocalyptic number.

It is an amenable number.

21021303005 is a deficient number, since it is larger than the sum of its proper divisors (4246376995).

21021303005 is an equidigital number, since it uses as much as digits as its factorization.

21021303005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7019403.

The product of its (nonzero) digits is 180, while the sum is 17.

Adding to 21021303005 its reverse (50030312012), we get a palindrome (71051615017).

The spelling of 21021303005 in words is "twenty-one billion, twenty-one million, three hundred three thousand, five".