21245004301 has 4 divisors (see below), whose sum is σ = 21247956892. Its totient is φ = 21242051712.

The previous prime is 21245004247. The next prime is 21245004307. The reversal of 21245004301 is 10340054212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14667632100 + 6577372201 = 121110^2 + 81101^2 .

It is a cyclic number.

It is not a de Polignac number, because 21245004301 - 2⁷ = 21245004173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21245004307) 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, 1465476 + ... + 1479901.

It is an arithmetic number, because the mean of its divisors is an integer number (5311989223).

Almost surely, 2^21245004301 is an apocalyptic number.

It is an amenable number.

21245004301 is a deficient number, since it is larger than the sum of its proper divisors (2952591).

21245004301 is an equidigital number, since it uses as much as digits as its factorization.

21245004301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2952590.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 21245004301 its reverse (10340054212), we get a palindrome (31585058513).

The spelling of 21245004301 in words is "twenty-one billion, two hundred forty-five million, four thousand, three hundred one".