12211121010220 has 96 divisors (see below), whose sum is σ = 28256962612032. Its totient is φ = 4395600000000.

The previous prime is 12211121010217. The next prime is 12211121010241. The reversal of 12211121010220 is 2201012111221.

It is a super-2 number, since 2×12211121010220² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12211121010194 and 12211121010203.

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, 122182270 + ... + 122282170.

It is an arithmetic number, because the mean of its divisors is an integer number (294343360542).

Almost surely, 2^{12211121010220} is an apocalyptic number.

12211121010220 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 12211121010220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14128481306016).

12211121010220 is an abundant number, since it is smaller than the sum of its proper divisors (16045841601812).

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

12211121010220 is a wasteful number, since it uses less digits than its factorization.

12211121010220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105523 (or 105521 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12211121010220 its reverse (2201012111221), we get a palindrome (14412133121441).

The spelling of 12211121010220 in words is "twelve trillion, two hundred eleven billion, one hundred twenty-one million, ten thousand, two hundred twenty".