21211112002127 has 2 divisors, whose sum is σ = 21211112002128. Its totient is φ = 21211112002126.

The previous prime is 21211112002111. The next prime is 21211112002151. The reversal of 21211112002127 is 72120021111212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21211112002127 - 2⁴ = 21211112002111 is a prime.

It is a super-2 number, since 2×21211112002127² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21211112002177) 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, 10605556001063 + 10605556001064.

It is an arithmetic number, because the mean of its divisors is an integer number (10605556001064).

Almost surely, 2^{21211112002127} is an apocalyptic number.

21211112002127 is a deficient number, since it is larger than the sum of its proper divisors (1).

21211112002127 is an equidigital number, since it uses as much as digits as its factorization.

21211112002127 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 23.

Adding to 21211112002127 its reverse (72120021111212), we get a palindrome (93331133113339).

The spelling of 21211112002127 in words is "twenty-one trillion, two hundred eleven billion, one hundred twelve million, two thousand, one hundred twenty-seven".