106208021 has 2 divisors, whose sum is σ = 106208022. Its totient is φ = 106208020.

The previous prime is 106208009. The next prime is 106208051. The reversal of 106208021 is 120802601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91107025 + 15100996 = 9545^2 + 3886^2 .

It is a cyclic number.

It is not a de Polignac number, because 106208021 - 2⁶ = 106207957 is a prime.

It is a super-2 number, since 2×106208021² = 22560287449472882, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 106207984 and 106208002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (106208051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53104010 + 53104011.

It is an arithmetic number, because the mean of its divisors is an integer number (53104011).

Almost surely, 2^106208021 is an apocalyptic number.

It is an amenable number.

106208021 is a deficient number, since it is larger than the sum of its proper divisors (1).

106208021 is an equidigital number, since it uses as much as digits as its factorization.

106208021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 106208021 is about 10305.7275822719. The cubic root of 106208021 is about 473.5717333200.

The spelling of 106208021 in words is "one hundred six million, two hundred eight thousand, twenty-one".