21241301423 has 4 divisors (see below), whose sum is σ = 22490789760. Its totient is φ = 19991813088.

The previous prime is 21241301369. The next prime is 21241301453. The reversal of 21241301423 is 32410314212.

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

It is a cyclic number.

It is not a de Polignac number, because 21241301423 - 2⁶ = 21241301359 is a prime.

It is a super-2 number, since 2×21241301423² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21241301453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 624744143 + ... + 624744176.

It is an arithmetic number, because the mean of its divisors is an integer number (5622697440).

Almost surely, 2^21241301423 is an apocalyptic number.

21241301423 is a deficient number, since it is larger than the sum of its proper divisors (1249488337).

21241301423 is a wasteful number, since it uses less digits than its factorization.

21241301423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249488336.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21241301423 its reverse (32410314212), we get a palindrome (53651615635).

The spelling of 21241301423 in words is "twenty-one billion, two hundred forty-one million, three hundred one thousand, four hundred twenty-three".