21302242127 has 2 divisors, whose sum is σ = 21302242128. Its totient is φ = 21302242126.

The previous prime is 21302242123. The next prime is 21302242163. The reversal of 21302242127 is 72124220312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21302242127 - 2² = 21302242123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21302242096 and 21302242105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21302242123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651121063 + 10651121064.

It is an arithmetic number, because the mean of its divisors is an integer number (10651121064).

Almost surely, 2^21302242127 is an apocalyptic number.

21302242127 is a deficient number, since it is larger than the sum of its proper divisors (1).

21302242127 is an equidigital number, since it uses as much as digits as its factorization.

21302242127 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 26.

Adding to 21302242127 its reverse (72124220312), we get a palindrome (93426462439).

The spelling of 21302242127 in words is "twenty-one billion, three hundred two million, two hundred forty-two thousand, one hundred twenty-seven".