21300127 has 2 divisors, whose sum is σ = 21300128. Its totient is φ = 21300126.

The previous prime is 21300119. The next prime is 21300137. The reversal of 21300127 is 72100312.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21300127 - 2³ = 21300119 is a prime.

It is a super-2 number, since 2×21300127² = 907390820432258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21300127.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21300137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10650063 + 10650064.

It is an arithmetic number, because the mean of its divisors is an integer number (10650064).

Almost surely, 2^21300127 is an apocalyptic number.

21300127 is a deficient number, since it is larger than the sum of its proper divisors (1).

21300127 is an equidigital number, since it uses as much as digits as its factorization.

21300127 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 21300127 is about 4615.2060625719. The cubic root of 21300127 is about 277.2005351033.

Adding to 21300127 its reverse (72100312), we get a palindrome (93400439).

The spelling of 21300127 in words is "twenty-one million, three hundred thousand, one hundred twenty-seven".