20210107 has 2 divisors, whose sum is σ = 20210108. Its totient is φ = 20210106.

The previous prime is 20210101. The next prime is 20210131. The reversal of 20210107 is 70101202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20210107 - 2¹¹ = 20208059 is a prime.

It is not a weakly prime, because it can be changed into another prime (20210101) 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, 10105053 + 10105054.

It is an arithmetic number, because the mean of its divisors is an integer number (10105054).

Almost surely, 2^20210107 is an apocalyptic number.

20210107 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210107 is an equidigital number, since it uses as much as digits as its factorization.

20210107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 20210107 is about 4495.5652592305. The cubic root of 20210107 is about 272.3889826369.

Adding to 20210107 its reverse (70101202), we get a palindrome (90311309).

The spelling of 20210107 in words is "twenty million, two hundred ten thousand, one hundred seven".