21341422221 has 24 divisors (see below), whose sum is σ = 33106776480. Its totient is φ = 12192963552.

The previous prime is 21341422199. The next prime is 21341422253. The reversal of 21341422221 is 12222414312.

It is not a de Polignac number, because 21341422221 - 2¹¹ = 21341420173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21341422191 and 21341422200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21341422621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1265970 + ... + 1282716.

It is an arithmetic number, because the mean of its divisors is an integer number (1379449020).

Almost surely, 2^21341422221 is an apocalyptic number.

21341422221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21341422221 is a deficient number, since it is larger than the sum of its proper divisors (11765354259).

21341422221 is a wasteful number, since it uses less digits than its factorization.

21341422221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25433 (or 25426 counting only the distinct ones).

The product of its digits is 1536, while the sum is 24.

Adding to 21341422221 its reverse (12222414312), we get a palindrome (33563836533).

The spelling of 21341422221 in words is "twenty-one billion, three hundred forty-one million, four hundred twenty-two thousand, two hundred twenty-one".