21103001212127 has 2 divisors, whose sum is σ = 21103001212128. Its totient is φ = 21103001212126.

The previous prime is 21103001212057. The next prime is 21103001212141. The reversal of 21103001212127 is 72121210030112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21103001212127 - 2¹⁴ = 21103001195743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21103001212147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551500606063 + 10551500606064.

It is an arithmetic number, because the mean of its divisors is an integer number (10551500606064).

Almost surely, 2^{21103001212127} is an apocalyptic number.

21103001212127 is a deficient number, since it is larger than the sum of its proper divisors (1).

21103001212127 is an equidigital number, since it uses as much as digits as its factorization.

21103001212127 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 23.

Adding to 21103001212127 its reverse (72121210030112), we get a palindrome (93224211242239).

The spelling of 21103001212127 in words is "twenty-one trillion, one hundred three billion, one million, two hundred twelve thousand, one hundred twenty-seven".