421200013344623 has 2 divisors, whose sum is σ = 421200013344624. Its totient is φ = 421200013344622.

The previous prime is 421200013344559. The next prime is 421200013344631. The reversal of 421200013344623 is 326443310002124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421200013344623 - 2⁶ = 421200013344559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421200013349623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210600006672311 + 210600006672312.

It is an arithmetic number, because the mean of its divisors is an integer number (210600006672312).

Almost surely, 2^{421200013344623} is an apocalyptic number.

421200013344623 is a deficient number, since it is larger than the sum of its proper divisors (1).

421200013344623 is an equidigital number, since it uses as much as digits as its factorization.

421200013344623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 35.

Adding to 421200013344623 its reverse (326443310002124), we get a palindrome (747643323346747).

The spelling of 421200013344623 in words is "four hundred twenty-one trillion, two hundred billion, thirteen million, three hundred forty-four thousand, six hundred twenty-three".