100421335543 has 2 divisors, whose sum is σ = 100421335544. Its totient is φ = 100421335542.

The previous prime is 100421335541. The next prime is 100421335589. The reversal of 100421335543 is 345533124001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100421335543 - 2¹ = 100421335541 is a prime.

Together with 100421335541, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100421335541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50210667771 + 50210667772.

It is an arithmetic number, because the mean of its divisors is an integer number (50210667772).

Almost surely, 2^100421335543 is an apocalyptic number.

100421335543 is a deficient number, since it is larger than the sum of its proper divisors (1).

100421335543 is an equidigital number, since it uses as much as digits as its factorization.

100421335543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 100421335543 its reverse (345533124001), we get a palindrome (445954459544).

The spelling of 100421335543 in words is "one hundred billion, four hundred twenty-one million, three hundred thirty-five thousand, five hundred forty-three".