802010101 has 4 divisors (see below), whose sum is σ = 802067500. Its totient is φ = 801952704.

The previous prime is 802010087. The next prime is 802010117. The reversal of 802010101 is 101010208.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 631315876 + 170694225 = 25126^2 + 13065^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-802010101 is a prime.

It is a Duffinian number.

802010101 is a modest number, since divided by 10101 gives 802 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (802010141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7375 + ... + 40723.

It is an arithmetic number, because the mean of its divisors is an integer number (200516875).

Almost surely, 2^802010101 is an apocalyptic number.

It is an amenable number.

802010101 is a deficient number, since it is larger than the sum of its proper divisors (57399).

802010101 is a wasteful number, since it uses less digits than its factorization.

802010101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57398.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 802010101 is about 28319.7828558059. The cubic root of 802010101 is about 929.0946216331.

Adding to 802010101 its reverse (101010208), we get a palindrome (903020309).

The spelling of 802010101 in words is "eight hundred two million, ten thousand, one hundred one".