42432443002421 has 2 divisors, whose sum is σ = 42432443002422. Its totient is φ = 42432443002420.

The previous prime is 42432443002399. The next prime is 42432443002457. The reversal of 42432443002421 is 12420034423424.

42432443002421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41464442825521 + 968000176900 = 6439289^2 + 983870^2 .

It is a cyclic number.

It is not a de Polignac number, because 42432443002421 - 2¹⁰ = 42432443001397 is a prime.

It is a super-2 number, since 2×42432443002421² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42432443002321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21216221501210 + 21216221501211.

It is an arithmetic number, because the mean of its divisors is an integer number (21216221501211).

Almost surely, 2^{42432443002421} is an apocalyptic number.

It is an amenable number.

42432443002421 is a deficient number, since it is larger than the sum of its proper divisors (1).

42432443002421 is an equidigital number, since it uses as much as digits as its factorization.

42432443002421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 147456, while the sum is 35.

Adding to 42432443002421 its reverse (12420034423424), we get a palindrome (54852477425845).

The spelling of 42432443002421 in words is "forty-two trillion, four hundred thirty-two billion, four hundred forty-three million, two thousand, four hundred twenty-one".