102110012000021 has 2 divisors, whose sum is σ = 102110012000022. Its totient is φ = 102110012000020.

The previous prime is 102110011999999. The next prime is 102110012000047. The reversal of 102110012000021 is 120000210011201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75547213404100 + 26562798595921 = 8691790^2 + 5153911^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102110012000021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102110011999966 and 102110012000011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102110012000921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51055006000010 + 51055006000011.

It is an arithmetic number, because the mean of its divisors is an integer number (51055006000011).

Almost surely, 2^{102110012000021} is an apocalyptic number.

It is an amenable number.

102110012000021 is a deficient number, since it is larger than the sum of its proper divisors (1).

102110012000021 is an equidigital number, since it uses as much as digits as its factorization.

102110012000021 is an evil number, because the sum of its binary digits is even.

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

Adding to 102110012000021 its reverse (120000210011201), we get a palindrome (222110222011222).

The spelling of 102110012000021 in words is "one hundred two trillion, one hundred ten billion, twelve million, twenty-one", and thus it is an aban number.