21063142799 has 2 divisors, whose sum is σ = 21063142800. Its totient is φ = 21063142798.

The previous prime is 21063142781. The next prime is 21063142811. The reversal of 21063142799 is 99724136012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21063142799 - 2¹⁶ = 21063077263 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 (21063142729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10531571399 + 10531571400.

It is an arithmetic number, because the mean of its divisors is an integer number (10531571400).

Almost surely, 2^21063142799 is an apocalyptic number.

21063142799 is a deficient number, since it is larger than the sum of its proper divisors (1).

21063142799 is an equidigital number, since it uses as much as digits as its factorization.

21063142799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 44.

The spelling of 21063142799 in words is "twenty-one billion, sixty-three million, one hundred forty-two thousand, seven hundred ninety-nine".