100421122543 has 4 divisors (see below), whose sum is σ = 114766997200. Its totient is φ = 86075247888.

The previous prime is 100421122513. The next prime is 100421122547. The reversal of 100421122543 is 345221124001.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 100421122543 - 2¹³ = 100421114351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100421122547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7172937318 + ... + 7172937331.

It is an arithmetic number, because the mean of its divisors is an integer number (28691749300).

Almost surely, 2^100421122543 is an apocalyptic number.

100421122543 is a deficient number, since it is larger than the sum of its proper divisors (14345874657).

100421122543 is an equidigital number, since it uses as much as digits as its factorization.

100421122543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14345874656.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 100421122543 its reverse (345221124001), we get a palindrome (445642246544).

The spelling of 100421122543 in words is "one hundred billion, four hundred twenty-one million, one hundred twenty-two thousand, five hundred forty-three".