21423002301243 has 12 divisors (see below), whose sum is σ = 30958383139320. Its totient is φ = 14275518542496.

The previous prime is 21423002301199. The next prime is 21423002301251. The reversal of 21423002301243 is 34210320032412.

21423002301243 is a `hidden beast` number, since 2 + 1 + 4 + 2 + 300 + 230 + 124 + 3 = 666.

It is not a de Polignac number, because 21423002301243 - 2⁹ = 21423002300731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21423002301293) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 540228378 + ... + 540268031.

It is an arithmetic number, because the mean of its divisors is an integer number (2579865261610).

Almost surely, 2^{21423002301243} is an apocalyptic number.

21423002301243 is a deficient number, since it is larger than the sum of its proper divisors (9535380838077).

21423002301243 is a wasteful number, since it uses less digits than its factorization.

21423002301243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080498618 (or 1080498615 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 21423002301243 its reverse (34210320032412), we get a palindrome (55633322333655).

The spelling of 21423002301243 in words is "twenty-one trillion, four hundred twenty-three billion, two million, three hundred one thousand, two hundred forty-three".