80101001 has 4 divisors (see below), whose sum is σ = 80249604. Its totient is φ = 79952400.

The previous prime is 80100997. The next prime is 80101009. The reversal of 80101001 is 10010108.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22705225 + 57395776 = 4765^2 + 7576^2 .

It is a cyclic number.

It is not a de Polignac number, because 80101001 - 2² = 80100997 is a prime.

It is a super-2 number, since 2×80101001² = 12832340722404002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80101009) 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 in 3 ways as a sum of consecutive naturals, for example, 73490 + ... + 74571.

It is an arithmetic number, because the mean of its divisors is an integer number (20062401).

Almost surely, 2^80101001 is an apocalyptic number.

It is an amenable number.

80101001 is a deficient number, since it is larger than the sum of its proper divisors (148603).

80101001 is a wasteful number, since it uses less digits than its factorization.

80101001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148602.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 80101001 is about 8949.9162565915. The cubic root of 80101001 is about 431.0681951297.

Adding to 80101001 its reverse (10010108), we get a palindrome (90111109).

It can be divided in two parts, 8010 and 1001, that multiplied together give a triangular number (8018010 = T₄₀₀₄).

The spelling of 80101001 in words is "eighty million, one hundred one thousand, one".