21022112143 has 2 divisors, whose sum is σ = 21022112144. Its totient is φ = 21022112142.

The previous prime is 21022112117. The next prime is 21022112159. The reversal of 21022112143 is 34121122012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21022112143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21022112143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21022119143) 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 as a sum of consecutive naturals, namely, 10511056071 + 10511056072.

It is an arithmetic number, because the mean of its divisors is an integer number (10511056072).

Almost surely, 2^21022112143 is an apocalyptic number.

21022112143 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022112143 is an equidigital number, since it uses as much as digits as its factorization.

21022112143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21022112143 its reverse (34121122012), we get a palindrome (55143234155).

The spelling of 21022112143 in words is "twenty-one billion, twenty-two million, one hundred twelve thousand, one hundred forty-three".