21325304001 has 4 divisors (see below), whose sum is σ = 28433738672. Its totient is φ = 14216869332.

The previous prime is 21325303991. The next prime is 21325304051. The reversal of 21325304001 is 10040352312.

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 de Polignac number, because none of the positive numbers 2^k-21325304001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21325304051) 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, 3554217331 + ... + 3554217336.

It is an arithmetic number, because the mean of its divisors is an integer number (7108434668).

Almost surely, 2^21325304001 is an apocalyptic number.

It is an amenable number.

21325304001 is a deficient number, since it is larger than the sum of its proper divisors (7108434671).

21325304001 is an equidigital number, since it uses as much as digits as its factorization.

21325304001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7108434670.

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 21325304001 its reverse (10040352312), we get a palindrome (31365656313).

The spelling of 21325304001 in words is "twenty-one billion, three hundred twenty-five million, three hundred four thousand, one".