2221022122020 has 72 divisors (see below), whose sum is σ = 7255338939576. Its totient is φ = 546713137152.

The previous prime is 2221022122013. The next prime is 2221022122043. The reversal of 2221022122020 is 202212201222.

2221022122020 is a `hidden beast` number, since 2 + 221 + 0 + 221 + 220 + 2 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 78727381056 + 2142294740964 = 280584^2 + 1463658^2 .

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 = 2221022121984 and 2221022122002.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 474575037 + ... + 474579716.

It is an arithmetic number, because the mean of its divisors is an integer number (100768596383).

Almost surely, 2^{2221022122020} is an apocalyptic number.

2221022122020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221022122020 is an abundant number, since it is smaller than the sum of its proper divisors (5034316817556).

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

2221022122020 is a wasteful number, since it uses less digits than its factorization.

2221022122020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949154781 (or 949154776 counting only the distinct ones).

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

Adding to 2221022122020 its reverse (202212201222), we get a palindrome (2423234323242).

The spelling of 2221022122020 in words is "two trillion, two hundred twenty-one billion, twenty-two million, one hundred twenty-two thousand, twenty".