21230544264001 has 4 divisors (see below), whose sum is σ = 21234299893972. Its totient is φ = 21226788634032.

The previous prime is 21230544263993. The next prime is 21230544264019. The reversal of 21230544264001 is 10046244503212.

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 5822564174001 + 15407980090000 = 2412999^2 + 3925300^2 .

It is a cyclic number.

It is not a de Polignac number, because 21230544264001 - 2³ = 21230544263993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21230544264301) 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, 1877806506 + ... + 1877817811.

It is an arithmetic number, because the mean of its divisors is an integer number (5308574973493).

Almost surely, 2^{21230544264001} is an apocalyptic number.

It is an amenable number.

21230544264001 is a deficient number, since it is larger than the sum of its proper divisors (3755629971).

21230544264001 is an equidigital number, since it uses as much as digits as its factorization.

21230544264001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3755629970.

The product of its (nonzero) digits is 46080, while the sum is 34.

Adding to 21230544264001 its reverse (10046244503212), we get a palindrome (31276788767213).

The spelling of 21230544264001 in words is "twenty-one trillion, two hundred thirty billion, five hundred forty-four million, two hundred sixty-four thousand, one".