21225030143 has 2 divisors, whose sum is σ = 21225030144. Its totient is φ = 21225030142.

The previous prime is 21225030133. The next prime is 21225030181. The reversal of 21225030143 is 34103052212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21225030143 - 2¹⁸ = 21224767999 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21225030133) 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, 10612515071 + 10612515072.

It is an arithmetic number, because the mean of its divisors is an integer number (10612515072).

Almost surely, 2^21225030143 is an apocalyptic number.

21225030143 is a deficient number, since it is larger than the sum of its proper divisors (1).

21225030143 is an equidigital number, since it uses as much as digits as its factorization.

21225030143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 21225030143 its reverse (34103052212), we get a palindrome (55328082355).

The spelling of 21225030143 in words is "twenty-one billion, two hundred twenty-five million, thirty thousand, one hundred forty-three".