42423441100421 has 2 divisors, whose sum is σ = 42423441100422. Its totient is φ = 42423441100420.

The previous prime is 42423441100357. The next prime is 42423441100451. The reversal of 42423441100421 is 12400114432424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30842317459396 + 11581123641025 = 5553586^2 + 3403105^2 .

It is a cyclic number.

It is not a de Polignac number, because 42423441100421 - 2⁶ = 42423441100357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42423441100451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21211720550210 + 21211720550211.

It is an arithmetic number, because the mean of its divisors is an integer number (21211720550211).

Almost surely, 2^{42423441100421} is an apocalyptic number.

It is an amenable number.

42423441100421 is a deficient number, since it is larger than the sum of its proper divisors (1).

42423441100421 is an equidigital number, since it uses as much as digits as its factorization.

42423441100421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24576, while the sum is 32.

Adding to 42423441100421 its reverse (12400114432424), we get a palindrome (54823555532845).

The spelling of 42423441100421 in words is "forty-two trillion, four hundred twenty-three billion, four hundred forty-one million, one hundred thousand, four hundred twenty-one".