21112102000001 has 2 divisors, whose sum is σ = 21112102000002. Its totient is φ = 21112102000000.

The previous prime is 21112101999979. The next prime is 21112102000103. The reversal of 21112102000001 is 10000020121112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20797695081601 + 314406918400 = 4560449^2 + 560720^2 .

It is a cyclic number.

It is not a de Polignac number, because 21112102000001 - 2³⁸ = 20837224093057 is a prime.

It is not a weakly prime, because it can be changed into another prime (21112102002001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556051000000 + 10556051000001.

It is an arithmetic number, because the mean of its divisors is an integer number (10556051000001).

Almost surely, 2^{21112102000001} is an apocalyptic number.

It is an amenable number.

21112102000001 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112102000001 is an equidigital number, since it uses as much as digits as its factorization.

21112102000001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21112102000001 its reverse (10000020121112), we get a palindrome (31112122121113).

The spelling of 21112102000001 in words is "twenty-one trillion, one hundred twelve billion, one hundred two million, one", and thus it is an aban number.