2201221222020 has 72 divisors (see below), whose sum is σ = 6857498206104. Its totient is φ = 571127666688.

The previous prime is 2201221222019. The next prime is 2201221222043. The reversal of 2201221222020 is 202221221022.

2201221222020 is a `hidden beast` number, since 2 + 201 + 221 + 2 + 220 + 20 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 976622250564 + 1224598971456 = 988242^2 + 1106616^2 .

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 = 2201221221984 and 2201221222002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 165250189 + ... + 165263508.

Almost surely, 2^{2201221222020} is an apocalyptic number.

2201221222020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2201221222020 is an abundant number, since it is smaller than the sum of its proper divisors (4656276984084).

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

2201221222020 is a wasteful number, since it uses less digits than its factorization.

2201221222020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330513749 (or 330513744 counting only the distinct ones).

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

Adding to 2201221222020 its reverse (202221221022), we get a palindrome (2403442443042).

The spelling of 2201221222020 in words is "two trillion, two hundred one billion, two hundred twenty-one million, two hundred twenty-two thousand, twenty".