2123200456 has 16 divisors (see below), whose sum is σ = 4287231900. Its totient is φ = 979938624.

The previous prime is 2123200441. The next prime is 2123200537. The reversal of 2123200456 is 6540023212.

It can be written as a sum of positive squares in 2 ways, for example, as 2060252100 + 62948356 = 45390^2 + 7934^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2123200456.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10207591 + ... + 10207798.

Almost surely, 2^2123200456 is an apocalyptic number.

2123200456 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2123200456 is an abundant number, since it is smaller than the sum of its proper divisors (2164031444).

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

2123200456 is a wasteful number, since it uses less digits than its factorization.

2123200456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20415408 (or 20415404 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 2123200456 is about 46078.1993571797. The cubic root of 2123200456 is about 1285.2777803387.

Adding to 2123200456 its reverse (6540023212), we get a palindrome (8663223668).

The spelling of 2123200456 in words is "two billion, one hundred twenty-three million, two hundred thousand, four hundred fifty-six".