21130213127 has 2 divisors, whose sum is σ = 21130213128. Its totient is φ = 21130213126.

The previous prime is 21130213079. The next prime is 21130213163. The reversal of 21130213127 is 72131203112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21130213127 - 2¹⁴ = 21130196743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21130213927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10565106563 + 10565106564.

It is an arithmetic number, because the mean of its divisors is an integer number (10565106564).

Almost surely, 2^21130213127 is an apocalyptic number.

21130213127 is a deficient number, since it is larger than the sum of its proper divisors (1).

21130213127 is an equidigital number, since it uses as much as digits as its factorization.

21130213127 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

Adding to 21130213127 its reverse (72131203112), we get a palindrome (93261416239).

The spelling of 21130213127 in words is "twenty-one billion, one hundred thirty million, two hundred thirteen thousand, one hundred twenty-seven".