12200121234 has 48 divisors (see below), whose sum is σ = 31537735200. Its totient is φ = 3485748168.

The previous prime is 12200121233. The next prime is 12200121239. The reversal of 12200121234 is 43212100221.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (12200121233) 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, 2302744 + ... + 2308035.

It is an arithmetic number, because the mean of its divisors is an integer number (657036150).

Almost surely, 2^12200121234 is an apocalyptic number.

12200121234 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12200121234 is an abundant number, since it is smaller than the sum of its proper divisors (19337613966).

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

12200121234 is a wasteful number, since it uses less digits than its factorization.

12200121234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4610804 (or 4610791 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 12200121234 its reverse (43212100221), we get a palindrome (55412221455).

The spelling of 12200121234 in words is "twelve billion, two hundred million, one hundred twenty-one thousand, two hundred thirty-four".