421100441421 has 16 divisors (see below), whose sum is σ = 612955909440. Its totient is φ = 255026481920.

The previous prime is 421100441369. The next prime is 421100441441. The reversal of 421100441421 is 124144001124.

It is a cyclic number.

It is not a de Polignac number, because 421100441421 - 2¹¹ = 421100439373 is a prime.

It is a super-2 number, since 2×421100441421² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 421100441391 and 421100441400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421100441441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4601676 + ... + 4692293.

It is an arithmetic number, because the mean of its divisors is an integer number (38309744340).

Almost surely, 2^421100441421 is an apocalyptic number.

It is an amenable number.

421100441421 is a deficient number, since it is larger than the sum of its proper divisors (191855468019).

421100441421 is a wasteful number, since it uses less digits than its factorization.

421100441421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9295356.

The product of its (nonzero) digits is 1024, while the sum is 24.

Adding to 421100441421 its reverse (124144001124), we get a palindrome (545244442545).

The spelling of 421100441421 in words is "four hundred twenty-one billion, one hundred million, four hundred forty-one thousand, four hundred twenty-one".