21340124331243 has 8 divisors (see below), whose sum is σ = 28843273069008. Its totient is φ = 14031862573824.

The previous prime is 21340124331209. The next prime is 21340124331289. The reversal of 21340124331243 is 34213342104312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21340124331243 - 2⁶ = 21340124331179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21340124332243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48721744830 + ... + 48721745267.

It is an arithmetic number, because the mean of its divisors is an integer number (3605409133626).

Almost surely, 2^{21340124331243} is an apocalyptic number.

21340124331243 is a deficient number, since it is larger than the sum of its proper divisors (7503148737765).

21340124331243 is an equidigital number, since it uses as much as digits as its factorization.

21340124331243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97443490173.

The product of its (nonzero) digits is 41472, while the sum is 33.

Adding to 21340124331243 its reverse (34213342104312), we get a palindrome (55553466435555).

The spelling of 21340124331243 in words is "twenty-one trillion, three hundred forty billion, one hundred twenty-four million, three hundred thirty-one thousand, two hundred forty-three".