810101212 has 12 divisors (see below), whose sum is σ = 1447840800. Its totient is φ = 396432416.

The previous prime is 810101191. The next prime is 810101291. The reversal of 810101212 is 212101018.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

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, 2154337 + ... + 2154712.

It is an arithmetic number, because the mean of its divisors is an integer number (120653400).

Almost surely, 2^810101212 is an apocalyptic number.

It is an amenable number.

810101212 is a deficient number, since it is larger than the sum of its proper divisors (637739588).

810101212 is a wasteful number, since it uses less digits than its factorization.

810101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4309100 (or 4309098 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

The square root of 810101212 is about 28462.2769995656. The cubic root of 810101212 is about 932.2085759983.

The spelling of 810101212 in words is "eight hundred ten million, one hundred one thousand, two hundred twelve".