40424304232421 has 2 divisors, whose sum is σ = 40424304232422. Its totient is φ = 40424304232420.

The previous prime is 40424304232349. The next prime is 40424304232441. The reversal of 40424304232421 is 12423240342404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28424412417025 + 11999891815396 = 5331455^2 + 3464086^2 .

It is a cyclic number.

It is not a de Polignac number, because 40424304232421 - 2¹⁰ = 40424304231397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40424304232441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20212152116210 + 20212152116211.

It is an arithmetic number, because the mean of its divisors is an integer number (20212152116211).

Almost surely, 2^{40424304232421} is an apocalyptic number.

It is an amenable number.

40424304232421 is a deficient number, since it is larger than the sum of its proper divisors (1).

40424304232421 is an equidigital number, since it uses as much as digits as its factorization.

40424304232421 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 40424304232421 its reverse (12423240342404), we get a palindrome (52847544574825).

The spelling of 40424304232421 in words is "forty trillion, four hundred twenty-four billion, three hundred four million, two hundred thirty-two thousand, four hundred twenty-one".