21023123541083 has 4 divisors (see below), whose sum is σ = 21023586314568. Its totient is φ = 21022660767600.

The previous prime is 21023123541071. The next prime is 21023123541149. The reversal of 21023123541083 is 38014532132012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21023123541083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21023123543083) 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, 231318593 + ... + 231409458.

It is an arithmetic number, because the mean of its divisors is an integer number (5255896578642).

Almost surely, 2^{21023123541083} is an apocalyptic number.

21023123541083 is a deficient number, since it is larger than the sum of its proper divisors (462773485).

21023123541083 is an equidigital number, since it uses as much as digits as its factorization.

21023123541083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462773484.

The product of its (nonzero) digits is 34560, while the sum is 35.

Adding to 21023123541083 its reverse (38014532132012), we get a palindrome (59037655673095).

The spelling of 21023123541083 in words is "twenty-one trillion, twenty-three billion, one hundred twenty-three million, five hundred forty-one thousand, eighty-three".