42033341521 has 2 divisors, whose sum is σ = 42033341522. Its totient is φ = 42033341520.

The previous prime is 42033341479. The next prime is 42033341611. The reversal of 42033341521 is 12514333024.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41459068225 + 574273296 = 203615^2 + 23964^2 .

It is a cyclic number.

It is not a de Polignac number, because 42033341521 - 2¹¹ = 42033339473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42033341521.

It is not a weakly prime, because it can be changed into another prime (42033341221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21016670760 + 21016670761.

It is an arithmetic number, because the mean of its divisors is an integer number (21016670761).

Almost surely, 2^42033341521 is an apocalyptic number.

It is an amenable number.

42033341521 is a deficient number, since it is larger than the sum of its proper divisors (1).

42033341521 is an equidigital number, since it uses as much as digits as its factorization.

42033341521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 42033341521 its reverse (12514333024), we get a palindrome (54547674545).

The spelling of 42033341521 in words is "forty-two billion, thirty-three million, three hundred forty-one thousand, five hundred twenty-one".