42524250121 has 2 divisors, whose sum is σ = 42524250122. Its totient is φ = 42524250120.

The previous prime is 42524250103. The next prime is 42524250157. The reversal of 42524250121 is 12105242524.

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., 42520502025 + 3748096 = 206205^2 + 1936^2 .

It is a cyclic number.

It is not a de Polignac number, because 42524250121 - 2¹⁹ = 42523725833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42524250121.

It is not a weakly prime, because it can be changed into another prime (42524250191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21262125060 + 21262125061.

It is an arithmetic number, because the mean of its divisors is an integer number (21262125061).

Almost surely, 2^42524250121 is an apocalyptic number.

It is an amenable number.

42524250121 is a deficient number, since it is larger than the sum of its proper divisors (1).

42524250121 is an equidigital number, since it uses as much as digits as its factorization.

42524250121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6400, while the sum is 28.

Adding to 42524250121 its reverse (12105242524), we get a palindrome (54629492645).

The spelling of 42524250121 in words is "forty-two billion, five hundred twenty-four million, two hundred fifty thousand, one hundred twenty-one".