42452105021 has 2 divisors, whose sum is σ = 42452105022. Its totient is φ = 42452105020.

The previous prime is 42452104997. The next prime is 42452105041. The reversal of 42452105021 is 12050125424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38313756121 + 4138348900 = 195739^2 + 64330^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42452105021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42452105041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21226052510 + 21226052511.

It is an arithmetic number, because the mean of its divisors is an integer number (21226052511).

Almost surely, 2^42452105021 is an apocalyptic number.

It is an amenable number.

42452105021 is a deficient number, since it is larger than the sum of its proper divisors (1).

42452105021 is an equidigital number, since it uses as much as digits as its factorization.

42452105021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3200, while the sum is 26.

The spelling of 42452105021 in words is "forty-two billion, four hundred fifty-two million, one hundred five thousand, twenty-one".