1020101 has 2 divisors, whose sum is σ = 1020102. Its totient is φ = 1020100.

The previous prime is 1020079. The next prime is 1020109. The reversal of 1020101 is 1010201.

It is a happy number.

1020101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 1010²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1020100 + 1 = 1010^2 + 1^2 .

It is an emirp because it is prime and its reverse (1010201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1020101 - 2⁶ = 1020037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510050 + 510051.

It is an arithmetic number, because the mean of its divisors is an integer number (510051).

2^1020101 is an apocalyptic number.

It is an amenable number.

1020101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020101 is an equidigital number, since it uses as much as digits as its factorization.

1020101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2, while the sum is 5.

The square root of 1020101 is about 1010.0004950494. Note that the first 3 decimals coincide. The cubic root of 1020101 is about 100.6655933592.

Adding to 1020101 its reverse (1010201), we get a palindrome (2030302).

Multiplying 1020101 by its reverse (1010201), we get a palindrome (1030507050301).

The spelling of 1020101 in words is "one million, twenty thousand, one hundred one".