106885021 has 2 divisors, whose sum is σ = 106885022. Its totient is φ = 106885020.

The previous prime is 106885019. The next prime is 106885043. The reversal of 106885021 is 120588601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78943225 + 27941796 = 8885^2 + 5286^2 .

It is a cyclic number.

It is not a de Polignac number, because 106885021 - 2¹ = 106885019 is a prime.

It is a super-2 number, since 2×106885021² = 22848815428340882, which contains 22 as substring.

Together with 106885019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (106885091) 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, 53442510 + 53442511.

It is an arithmetic number, because the mean of its divisors is an integer number (53442511).

Almost surely, 2^106885021 is an apocalyptic number.

It is an amenable number.

106885021 is a deficient number, since it is larger than the sum of its proper divisors (1).

106885021 is an equidigital number, since it uses as much as digits as its factorization.

106885021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 106885021 is about 10338.5212192073. The cubic root of 106885021 is about 474.5758296430.

The spelling of 106885021 in words is "one hundred six million, eight hundred eighty-five thousand, twenty-one".