100421430042421 has 4 divisors (see below), whose sum is σ = 100433318464512. Its totient is φ = 100409541620332.

The previous prime is 100421430042403. The next prime is 100421430042431. The reversal of 100421430042421 is 124240034124001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 100421430042421 - 2¹⁷ = 100421429911349 is a prime.

It is a super-2 number, since 2×100421430042421² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100421430042421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100421430042431) 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, 5944198375 + ... + 5944215268.

It is an arithmetic number, because the mean of its divisors is an integer number (25108329616128).

Almost surely, 2^{100421430042421} is an apocalyptic number.

It is an amenable number.

100421430042421 is a deficient number, since it is larger than the sum of its proper divisors (11888422091).

100421430042421 is an equidigital number, since it uses as much as digits as its factorization.

100421430042421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11888422090.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 100421430042421 its reverse (124240034124001), we get a palindrome (224661464166422).

The spelling of 100421430042421 in words is "one hundred trillion, four hundred twenty-one billion, four hundred thirty million, forty-two thousand, four hundred twenty-one".