100421413032421 has 4 divisors (see below), whose sum is σ = 108146137111852. Its totient is φ = 92696688952992.

The previous prime is 100421413032407. The next prime is 100421413032433. The reversal of 100421413032421 is 124230314124001.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11621887809921 + 88799525222500 = 3409089^2 + 9423350^2 .

It is a cyclic number.

It is not a de Polignac number, because 100421413032421 - 2¹¹ = 100421413030373 is a prime.

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 100421413032421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100421413012421) 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, 3862362039696 + ... + 3862362039721.

It is an arithmetic number, because the mean of its divisors is an integer number (27036534277963).

Almost surely, 2^{100421413032421} is an apocalyptic number.

It is an amenable number.

100421413032421 is a deficient number, since it is larger than the sum of its proper divisors (7724724079431).

100421413032421 is an equidigital number, since it uses as much as digits as its factorization.

100421413032421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7724724079430.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 100421413032421 its reverse (124230314124001), we get a palindrome (224651727156422).

The spelling of 100421413032421 in words is "one hundred trillion, four hundred twenty-one billion, four hundred thirteen million, thirty-two thousand, four hundred twenty-one".