421330254451 has 2 divisors, whose sum is σ = 421330254452. Its totient is φ = 421330254450.

The previous prime is 421330254407. The next prime is 421330254497. The reversal of 421330254451 is 154452033124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421330254451 - 2¹⁹ = 421329730163 is a prime.

It is a super-2 number, since 2×421330254451² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (421330258451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210665127225 + 210665127226.

It is an arithmetic number, because the mean of its divisors is an integer number (210665127226).

Almost surely, 2^421330254451 is an apocalyptic number.

421330254451 is a deficient number, since it is larger than the sum of its proper divisors (1).

421330254451 is an equidigital number, since it uses as much as digits as its factorization.

421330254451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 421330254451 its reverse (154452033124), we get a palindrome (575782287575).

The spelling of 421330254451 in words is "four hundred twenty-one billion, three hundred thirty million, two hundred fifty-four thousand, four hundred fifty-one".