21100120100027 has 2 divisors, whose sum is σ = 21100120100028. Its totient is φ = 21100120100026.

The previous prime is 21100120099999. The next prime is 21100120100057. The reversal of 21100120100027 is 72000102100112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21100120100027 - 2¹² = 21100120095931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21100120099978 and 21100120100014.

It is not a weakly prime, because it can be changed into another prime (21100120100057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550060050013 + 10550060050014.

It is an arithmetic number, because the mean of its divisors is an integer number (10550060050014).

Almost surely, 2^{21100120100027} is an apocalyptic number.

21100120100027 is a deficient number, since it is larger than the sum of its proper divisors (1).

21100120100027 is an equidigital number, since it uses as much as digits as its factorization.

21100120100027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 17.

Adding to 21100120100027 its reverse (72000102100112), we get a palindrome (93100222200139).

The spelling of 21100120100027 in words is "twenty-one trillion, one hundred billion, one hundred twenty million, one hundred thousand, twenty-seven".