810222111 has 12 divisors (see below), whose sum is σ = 1231916920. Its totient is φ = 511719120.

The previous prime is 810222103. The next prime is 810222113. The reversal of 810222111 is 111222018.

It is not a de Polignac number, because 810222111 - 2³ = 810222103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (810222113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2368900 + ... + 2369241.

Almost surely, 2^810222111 is an apocalyptic number.

810222111 is a deficient number, since it is larger than the sum of its proper divisors (421694809).

810222111 is a wasteful number, since it uses less digits than its factorization.

810222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4738166 (or 4738163 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The square root of 810222111 is about 28464.4007665716. The cubic root of 810222111 is about 932.2549477672.

Adding to 810222111 its reverse (111222018), we get a palindrome (921444129).

The spelling of 810222111 in words is "eight hundred ten million, two hundred twenty-two thousand, one hundred eleven".