45023105021 has 2 divisors, whose sum is σ = 45023105022. Its totient is φ = 45023105020.

The previous prime is 45023105009. The next prime is 45023105047. The reversal of 45023105021 is 12050132054.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25201562500 + 19821542521 = 158750^2 + 140789^2 .

It is a cyclic number.

It is not a de Polignac number, because 45023105021 - 2¹⁸ = 45022842877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45023105221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22511552510 + 22511552511.

It is an arithmetic number, because the mean of its divisors is an integer number (22511552511).

Almost surely, 2^45023105021 is an apocalyptic number.

It is an amenable number.

45023105021 is a deficient number, since it is larger than the sum of its proper divisors (1).

45023105021 is an equidigital number, since it uses as much as digits as its factorization.

45023105021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 45023105021 its reverse (12050132054), we get a palindrome (57073237075).

The spelling of 45023105021 in words is "forty-five billion, twenty-three million, one hundred five thousand, twenty-one".