21141414421 has 8 divisors (see below), whose sum is σ = 22386660120. Its totient is φ = 19896350208.

The previous prime is 21141414409. The next prime is 21141414451. The reversal of 21141414421 is 12441414112.

It can be written as a sum of positive squares in 4 ways, for example, as 2193891921 + 18947522500 = 46839^2 + 137650^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21141414421 - 2⁵ = 21141414389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21141414451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249145 + ... + 323041.

It is an arithmetic number, because the mean of its divisors is an integer number (2798332515).

Almost surely, 2^21141414421 is an apocalyptic number.

It is an amenable number.

21141414421 is a deficient number, since it is larger than the sum of its proper divisors (1245245699).

21141414421 is a wasteful number, since it uses less digits than its factorization.

21141414421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90743.

The product of its digits is 1024, while the sum is 25.

Adding to 21141414421 its reverse (12441414112), we get a palindrome (33582828533).

The spelling of 21141414421 in words is "twenty-one billion, one hundred forty-one million, four hundred fourteen thousand, four hundred twenty-one".