21334343231023 has 4 divisors (see below), whose sum is σ = 21854693065968. Its totient is φ = 20813993396080.

The previous prime is 21334343231021. The next prime is 21334343231041. The reversal of 21334343231023 is 32013234343312.

It is a happy number.

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 21334343231023 - 2¹ = 21334343231021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21334343231023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21334343231021) 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, 260174917411 + ... + 260174917492.

It is an arithmetic number, because the mean of its divisors is an integer number (5463673266492).

Almost surely, 2^{21334343231023} is an apocalyptic number.

21334343231023 is a deficient number, since it is larger than the sum of its proper divisors (520349834945).

21334343231023 is an equidigital number, since it uses as much as digits as its factorization.

21334343231023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520349834944.

The product of its (nonzero) digits is 93312, while the sum is 34.

Adding to 21334343231023 its reverse (32013234343312), we get a palindrome (53347577574335).

The spelling of 21334343231023 in words is "twenty-one trillion, three hundred thirty-four billion, three hundred forty-three million, two hundred thirty-one thousand, twenty-three".