12221202112220 has 24 divisors (see below), whose sum is σ = 25664710521408. Its totient is φ = 4888445400000.

The previous prime is 12221202112213. The next prime is 12221202112261. The reversal of 12221202112220 is 2221120212221.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 12221202112192 and 12221202112201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 705965 + ... + 4994075.

It is an arithmetic number, because the mean of its divisors is an integer number (1069362938392).

Almost surely, 2^{12221202112220} is an apocalyptic number.

12221202112220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12221202112220 is an abundant number, since it is smaller than the sum of its proper divisors (13443508409188).

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

12221202112220 is a wasteful number, since it uses less digits than its factorization.

12221202112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4430621 (or 4430619 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 12221202112220 its reverse (2221120212221), we get a palindrome (14442322324441).

The spelling of 12221202112220 in words is "twelve trillion, two hundred twenty-one billion, two hundred two million, one hundred twelve thousand, two hundred twenty".