201423421499 has 2 divisors, whose sum is σ = 201423421500. Its totient is φ = 201423421498.

The previous prime is 201423421439. The next prime is 201423421517. The reversal of 201423421499 is 994124324102.

201423421499 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201423421499 - 2³² = 197128454203 is a prime.

It is not a weakly prime, because it can be changed into another prime (201423421429) 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, 100711710749 + 100711710750.

It is an arithmetic number, because the mean of its divisors is an integer number (100711710750).

Almost surely, 2^201423421499 is an apocalyptic number.

201423421499 is a deficient number, since it is larger than the sum of its proper divisors (1).

201423421499 is an equidigital number, since it uses as much as digits as its factorization.

201423421499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 41.

The spelling of 201423421499 in words is "two hundred one billion, four hundred twenty-three million, four hundred twenty-one thousand, four hundred ninety-nine".