21143255341 has 4 divisors (see below), whose sum is σ = 22769659612. Its totient is φ = 19516851072.

The previous prime is 21143255311. The next prime is 21143255369. The reversal of 21143255341 is 14355234112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4458366441 + 16684888900 = 66771^2 + 129170^2 .

It is a cyclic number.

It is not a de Polignac number, because 21143255341 - 2²⁹ = 20606384429 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 (21143255311) 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 3 ways as a sum of consecutive naturals, for example, 813202116 + ... + 813202141.

It is an arithmetic number, because the mean of its divisors is an integer number (5692414903).

Almost surely, 2^21143255341 is an apocalyptic number.

It is an amenable number.

21143255341 is a deficient number, since it is larger than the sum of its proper divisors (1626404271).

21143255341 is a wasteful number, since it uses less digits than its factorization.

21143255341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1626404270.

The product of its digits is 14400, while the sum is 31.

Adding to 21143255341 its reverse (14355234112), we get a palindrome (35498489453).

The spelling of 21143255341 in words is "twenty-one billion, one hundred forty-three million, two hundred fifty-five thousand, three hundred forty-one".