21130303001 has 4 divisors (see below), whose sum is σ = 21130781904. Its totient is φ = 21129824100.

The previous prime is 21130302989. The next prime is 21130303003. The reversal of 21130303001 is 10030303112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21130303001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21130303003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165695 + ... + 264036.

It is an arithmetic number, because the mean of its divisors is an integer number (5282695476).

Almost surely, 2^21130303001 is an apocalyptic number.

It is an amenable number.

21130303001 is a deficient number, since it is larger than the sum of its proper divisors (478903).

21130303001 is an equidigital number, since it uses as much as digits as its factorization.

21130303001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478902.

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

Adding to 21130303001 its reverse (10030303112), we get a palindrome (31160606113).

The spelling of 21130303001 in words is "twenty-one billion, one hundred thirty million, three hundred three thousand, one".