21442412143 has 2 divisors, whose sum is σ = 21442412144. Its totient is φ = 21442412142.

The previous prime is 21442412119. The next prime is 21442412191. The reversal of 21442412143 is 34121424412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21442412143 - 2⁵ = 21442412111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21442413143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10721206071 + 10721206072.

It is an arithmetic number, because the mean of its divisors is an integer number (10721206072).

Almost surely, 2^21442412143 is an apocalyptic number.

21442412143 is a deficient number, since it is larger than the sum of its proper divisors (1).

21442412143 is an equidigital number, since it uses as much as digits as its factorization.

21442412143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6144, while the sum is 28.

Adding to 21442412143 its reverse (34121424412), we get a palindrome (55563836555).

The spelling of 21442412143 in words is "twenty-one billion, four hundred forty-two million, four hundred twelve thousand, one hundred forty-three".