820112211027 has 24 divisors (see below), whose sum is σ = 1186014003200. Its totient is φ = 546092232048.

The previous prime is 820112211007. The next prime is 820112211031. The reversal of 820112211027 is 720112211028.

It is a happy number.

It is not a de Polignac number, because 820112211027 - 2²² = 820108016723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (820112211007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31285308 + ... + 31311510.

Almost surely, 2^820112211027 is an apocalyptic number.

820112211027 is a deficient number, since it is larger than the sum of its proper divisors (365901792173).

820112211027 is a wasteful number, since it uses less digits than its factorization.

820112211027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30207 (or 30204 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

Subtracting from 820112211027 its reverse (720112211028), we obtain a palindrome (99999999999).

The spelling of 820112211027 in words is "eight hundred twenty billion, one hundred twelve million, two hundred eleven thousand, twenty-seven".