102110212021 has 2 divisors, whose sum is σ = 102110212022. Its totient is φ = 102110212020.

The previous prime is 102110212013. The next prime is 102110212027. The reversal of 102110212021 is 120212011201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96620883921 + 5489328100 = 310839^2 + 74090^2 .

It is a cyclic number.

It is not a de Polignac number, because 102110212021 - 2³ = 102110212013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102110211992 and 102110212010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102110212027) 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, 51055106010 + 51055106011.

It is an arithmetic number, because the mean of its divisors is an integer number (51055106011).

Almost surely, 2^102110212021 is an apocalyptic number.

It is an amenable number.

102110212021 is a deficient number, since it is larger than the sum of its proper divisors (1).

102110212021 is an equidigital number, since it uses as much as digits as its factorization.

102110212021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 102110212021 its reverse (120212011201), we get a palindrome (222322223222).

The spelling of 102110212021 in words is "one hundred two billion, one hundred ten million, two hundred twelve thousand, twenty-one".