2221011001220 has 36 divisors (see below), whose sum is σ = 5126680771212. Its totient is φ = 807640363200.

The previous prime is 2221011001217. The next prime is 2221011001241. The reversal of 2221011001220 is 221001101222.

It can be written as a sum of positive squares in 2 ways, for example, as 556250455684 + 1664760545536 = 745822^2 + 1290256^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2221011001195 and 2221011001204.

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, 458884151 + ... + 458888990.

Almost surely, 2^{2221011001220} is an apocalyptic number.

2221011001220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221011001220 is an abundant number, since it is smaller than the sum of its proper divisors (2905669769992).

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

2221011001220 is a wasteful number, since it uses less digits than its factorization.

2221011001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917773172 (or 917773159 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2221011001220 its reverse (221001101222), we get a palindrome (2442012102442).

The spelling of 2221011001220 in words is "two trillion, two hundred twenty-one billion, eleven million, one thousand, two hundred twenty".