4021424004391 has 2 divisors, whose sum is σ = 4021424004392. Its totient is φ = 4021424004390.

The previous prime is 4021424004331. The next prime is 4021424004431. The reversal of 4021424004391 is 1934004241204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4021424004391 - 2¹⁷ = 4021423873319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4021424004331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010712002195 + 2010712002196.

It is an arithmetic number, because the mean of its divisors is an integer number (2010712002196).

Almost surely, 2^{4021424004391} is an apocalyptic number.

4021424004391 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021424004391 is an equidigital number, since it uses as much as digits as its factorization.

4021424004391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 34.

Adding to 4021424004391 its reverse (1934004241204), we get a palindrome (5955428245595).

The spelling of 4021424004391 in words is "four trillion, twenty-one billion, four hundred twenty-four million, four thousand, three hundred ninety-one".