21124331341 has 4 divisors (see below), whose sum is σ = 21124624284. Its totient is φ = 21124038400.

The previous prime is 21124331323. The next prime is 21124331357. The reversal of 21124331341 is 14313342112.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 10690526025 + 10433805316 = 103395^2 + 102146^2 .

It is a cyclic number.

It is not a de Polignac number, because 21124331341 - 2¹¹ = 21124329293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21124331441) 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, 46011 + ... + 210631.

It is an arithmetic number, because the mean of its divisors is an integer number (5281156071).

Almost surely, 2^21124331341 is an apocalyptic number.

It is an amenable number.

21124331341 is a deficient number, since it is larger than the sum of its proper divisors (292943).

21124331341 is a wasteful number, since it uses less digits than its factorization.

21124331341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292942.

The product of its digits is 1728, while the sum is 25.

Adding to 21124331341 its reverse (14313342112), we get a palindrome (35437673453).

The spelling of 21124331341 in words is "twenty-one billion, one hundred twenty-four million, three hundred thirty-one thousand, three hundred forty-one".