21142043341 has 4 divisors (see below), whose sum is σ = 21166151452. Its totient is φ = 21117935232.

The previous prime is 21142043327. The next prime is 21142043381. The reversal of 21142043341 is 14334024112.

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 20025080100 + 1116963241 = 141510^2 + 33421^2 .

It is a cyclic number.

It is not a de Polignac number, because 21142043341 - 2⁹ = 21142042829 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 (21142043381) 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, 12052740 + ... + 12054493.

It is an arithmetic number, because the mean of its divisors is an integer number (5291537863).

Almost surely, 2^21142043341 is an apocalyptic number.

It is an amenable number.

21142043341 is a deficient number, since it is larger than the sum of its proper divisors (24108111).

21142043341 is an equidigital number, since it uses as much as digits as its factorization.

21142043341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24108110.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21142043341 its reverse (14334024112), we get a palindrome (35476067453).

The spelling of 21142043341 in words is "twenty-one billion, one hundred forty-two million, forty-three thousand, three hundred forty-one".