12221020112220 has 36 divisors (see below), whose sum is σ = 37070427674280. Its totient is φ = 3258938696544.

The previous prime is 12221020112209. The next prime is 12221020112237. The reversal of 12221020112220 is 2221102012221.

It is a happy number.

12221020112220 is a `hidden beast` number, since 1 + 22 + 210 + 201 + 12 + 220 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a junction number, because it is equal to n+sod(n) for n = 12221020112193 and 12221020112202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33947277910 + ... + 33947278269.

Almost surely, 2^{12221020112220} is an apocalyptic number.

12221020112220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12221020112220 is an abundant number, since it is smaller than the sum of its proper divisors (24849407562060).

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

12221020112220 is a wasteful number, since it uses less digits than its factorization.

12221020112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67894556194 (or 67894556189 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12221020112220 its reverse (2221102012221), we get a palindrome (14442122124441).

The spelling of 12221020112220 in words is "twelve trillion, two hundred twenty-one billion, twenty million, one hundred twelve thousand, two hundred twenty".