16421212459 has 2 divisors, whose sum is σ = 16421212460. Its totient is φ = 16421212458.

The previous prime is 16421212433. The next prime is 16421212469. The reversal of 16421212459 is 95421212461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16421212459 - 2⁵ = 16421212427 is a prime.

It is not a weakly prime, because it can be changed into another prime (16421212469) 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, 8210606229 + 8210606230.

It is an arithmetic number, because the mean of its divisors is an integer number (8210606230).

Almost surely, 2^16421212459 is an apocalyptic number.

16421212459 is a deficient number, since it is larger than the sum of its proper divisors (1).

16421212459 is an equidigital number, since it uses as much as digits as its factorization.

16421212459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 37.

It can be divided in two parts, 164212 and 12459, that added together give a palindrome (176671).

The spelling of 16421212459 in words is "sixteen billion, four hundred twenty-one million, two hundred twelve thousand, four hundred fifty-nine".