12211434220 has 24 divisors (see below), whose sum is σ = 27152483904. Its totient is φ = 4597245696.

The previous prime is 12211434187. The next prime is 12211434227. The reversal of 12211434220 is 2243411221.

It is a junction number, because it is equal to n+sod(n) for n = 12211434191 and 12211434200.

It is not an unprimeable number, because it can be changed into a prime (12211434227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17957652 + ... + 17958331.

It is an arithmetic number, because the mean of its divisors is an integer number (1131353496).

Almost surely, 2^12211434220 is an apocalyptic number.

12211434220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12211434220 is an abundant number, since it is smaller than the sum of its proper divisors (14941049684).

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

12211434220 is a wasteful number, since it uses less digits than its factorization.

12211434220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35916009 (or 35916007 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 12211434220 its reverse (2243411221), we get a palindrome (14454845441).

The spelling of 12211434220 in words is "twelve billion, two hundred eleven million, four hundred thirty-four thousand, two hundred twenty".