12201122121220 has 96 divisors (see below), whose sum is σ = 26570217373056. Its totient is φ = 4702861900800.

The previous prime is 12201122121217. The next prime is 12201122121233. The reversal of 12201122121220 is 2212122110221.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 299239435 + ... + 299280205.

It is an arithmetic number, because the mean of its divisors is an integer number (276773097636).

Almost surely, 2^{12201122121220} is an apocalyptic number.

12201122121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12201122121220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13285108686528).

12201122121220 is an abundant number, since it is smaller than the sum of its proper divisors (14369095251836).

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

12201122121220 is a wasteful number, since it uses less digits than its factorization.

12201122121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45301 (or 45299 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 12201122121220 its reverse (2212122110221), we get a palindrome (14413244231441).

The spelling of 12201122121220 in words is "twelve trillion, two hundred one billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred twenty".