801812101 has 2 divisors, whose sum is σ = 801812102. Its totient is φ = 801812100.

The previous prime is 801812069. The next prime is 801812111. The reversal of 801812101 is 101218108.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 415099876 + 386712225 = 20374^2 + 19665^2 .

It is a cyclic number.

It is not a de Polignac number, because 801812101 - 2⁵ = 801812069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (801812111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400906050 + 400906051.

It is an arithmetic number, because the mean of its divisors is an integer number (400906051).

Almost surely, 2^801812101 is an apocalyptic number.

It is an amenable number.

801812101 is a deficient number, since it is larger than the sum of its proper divisors (1).

801812101 is an equidigital number, since it uses as much as digits as its factorization.

801812101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 22.

The square root of 801812101 is about 28316.2868505035. The cubic root of 801812101 is about 929.0181571448.

It can be divided in two parts, 80 and 1812101, that added together give a palindrome (1812181).

The spelling of 801812101 in words is "eight hundred one million, eight hundred twelve thousand, one hundred one".