21341221133 has 16 divisors (see below), whose sum is σ = 23616820080. Its totient is φ = 19193266176.

The previous prime is 21341221093. The next prime is 21341221171. The reversal of 21341221133 is 33112214312.

It can be written as a sum of positive squares in 8 ways, for example, as 5206632649 + 16134588484 = 72157^2 + 127022^2 .

It is a cyclic number.

It is not a de Polignac number, because 21341221133 - 2⁸ = 21341220877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21341221099 and 21341221108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21341221633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175316 + ... + 270957.

It is an arithmetic number, because the mean of its divisors is an integer number (1476051255).

Almost surely, 2^21341221133 is an apocalyptic number.

It is an amenable number.

21341221133 is a deficient number, since it is larger than the sum of its proper divisors (2275598947).

21341221133 is a wasteful number, since it uses less digits than its factorization.

21341221133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446416.

The product of its digits is 864, while the sum is 23.

Adding to 21341221133 its reverse (33112214312), we get a palindrome (54453435445).

The spelling of 21341221133 in words is "twenty-one billion, three hundred forty-one million, two hundred twenty-one thousand, one hundred thirty-three".