42121424447 has 2 divisors, whose sum is σ = 42121424448. Its totient is φ = 42121424446.

The previous prime is 42121424383. The next prime is 42121424489. The reversal of 42121424447 is 74442412124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42121424447 - 2⁶ = 42121424383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42121454447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21060712223 + 21060712224.

It is an arithmetic number, because the mean of its divisors is an integer number (21060712224).

Almost surely, 2^42121424447 is an apocalyptic number.

42121424447 is a deficient number, since it is larger than the sum of its proper divisors (1).

42121424447 is an equidigital number, since it uses as much as digits as its factorization.

42121424447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57344, while the sum is 35.

The spelling of 42121424447 in words is "forty-two billion, one hundred twenty-one million, four hundred twenty-four thousand, four hundred forty-seven".