42121424433247 has 2 divisors, whose sum is σ = 42121424433248. Its totient is φ = 42121424433246.

The previous prime is 42121424433203. The next prime is 42121424433269. The reversal of 42121424433247 is 74233442412124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42121424433247 - 2¹⁹ = 42121423908959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42121424433287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21060712216623 + 21060712216624.

It is an arithmetic number, because the mean of its divisors is an integer number (21060712216624).

Almost surely, 2^{42121424433247} is an apocalyptic number.

42121424433247 is a deficient number, since it is larger than the sum of its proper divisors (1).

42121424433247 is an equidigital number, since it uses as much as digits as its factorization.

42121424433247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1032192, while the sum is 43.

The spelling of 42121424433247 in words is "forty-two trillion, one hundred twenty-one billion, four hundred twenty-four million, four hundred thirty-three thousand, two hundred forty-seven".