21023434333411 has 4 divisors (see below), whose sum is σ = 21046613423992. Its totient is φ = 21000255242832.

The previous prime is 21023434333409. The next prime is 21023434333427. The reversal of 21023434333411 is 11433343432012.

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 21023434333411 - 2¹ = 21023434333409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21023434333481) 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, 11589543930 + ... + 11589545743.

It is an arithmetic number, because the mean of its divisors is an integer number (5261653355998).

Almost surely, 2^{21023434333411} is an apocalyptic number.

21023434333411 is a deficient number, since it is larger than the sum of its proper divisors (23179090581).

21023434333411 is an equidigital number, since it uses as much as digits as its factorization.

21023434333411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23179090580.

The product of its (nonzero) digits is 62208, while the sum is 34.

Adding to 21023434333411 its reverse (11433343432012), we get a palindrome (32456777765423).

The spelling of 21023434333411 in words is "twenty-one trillion, twenty-three billion, four hundred thirty-four million, three hundred thirty-three thousand, four hundred eleven".