110010010021 has 2 divisors, whose sum is σ = 110010010022. Its totient is φ = 110010010020.

The previous prime is 110010010001. The next prime is 110010010073. The reversal of 110010010021 is 120010010011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92589969796 + 17420040225 = 304286^2 + 131985^2 .

It is a cyclic number.

It is not a de Polignac number, because 110010010021 - 2¹¹ = 110010007973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 110010009986 and 110010010013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110010010001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55005005010 + 55005005011.

It is an arithmetic number, because the mean of its divisors is an integer number (55005005011).

Almost surely, 2^110010010021 is an apocalyptic number.

It is an amenable number.

110010010021 is a deficient number, since it is larger than the sum of its proper divisors (1).

110010010021 is an equidigital number, since it uses as much as digits as its factorization.

110010010021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 110010010021 its reverse (120010010011), we get a palindrome (230020020032).

The spelling of 110010010021 in words is "one hundred ten billion, ten million, ten thousand, twenty-one".