2220221201220 has 96 divisors (see below), whose sum is σ = 7535296218240. Its totient is φ = 538235441280.

The previous prime is 2220221201201. The next prime is 2220221201221. The reversal of 2220221201220 is 221021220222.

2220221201220 is a `hidden beast` number, since 2 + 2 + 20 + 221 + 201 + 220 = 666.

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 = 2220221201193 and 2220221201202.

It is not an unprimeable number, because it can be changed into a prime (2220221201221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 186881367 + ... + 186893246.

It is an arithmetic number, because the mean of its divisors is an integer number (78492668940).

Almost surely, 2^{2220221201220} is an apocalyptic number.

2220221201220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2220221201220 is an abundant number, since it is smaller than the sum of its proper divisors (5315075017020).

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

2220221201220 is a wasteful number, since it uses less digits than its factorization.

2220221201220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373774642 (or 373774634 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 2220221201220 its reverse (221021220222), we get a palindrome (2441242421442).

The spelling of 2220221201220 in words is "two trillion, two hundred twenty billion, two hundred twenty-one million, two hundred one thousand, two hundred twenty".