12210200028 has 36 divisors (see below), whose sum is σ = 33238879128. Its totient is φ = 3756984480.

The previous prime is 12210200027. The next prime is 12210200039. The reversal of 12210200028 is 82000201221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12210200027) 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, 13044618 + ... + 13045553.

It is an arithmetic number, because the mean of its divisors is an integer number (923302198).

Almost surely, 2^12210200028 is an apocalyptic number.

12210200028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12210200028 is an abundant number, since it is smaller than the sum of its proper divisors (21028679100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12210200028 is a wasteful number, since it uses less digits than its factorization.

12210200028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26090194 (or 26090189 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12210200028 its reverse (82000201221), we get a palindrome (94210401249).

The spelling of 12210200028 in words is "twelve billion, two hundred ten million, two hundred thousand, twenty-eight".