2101222202220 has 72 divisors (see below), whose sum is σ = 6436813415760. Its totient is φ = 554778134400.

The previous prime is 2101222202207. The next prime is 2101222202243. The reversal of 2101222202220 is 222022221012.

2101222202220 is a `hidden beast` number, since 21 + 0 + 1 + 222 + 202 + 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 = 2101222202193 and 2101222202202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57771210 + ... + 57807569.

It is an arithmetic number, because the mean of its divisors is an integer number (89400186330).

Almost surely, 2^{2101222202220} is an apocalyptic number.

2101222202220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101222202220 is an abundant number, since it is smaller than the sum of its proper divisors (4335591213540).

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

2101222202220 is a wasteful number, since it uses less digits than its factorization.

2101222202220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115578895 (or 115578890 counting only the distinct ones).

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

Adding to 2101222202220 its reverse (222022221012), we get a palindrome (2323244423232).

The spelling of 2101222202220 in words is "two trillion, one hundred one billion, two hundred twenty-two million, two hundred two thousand, two hundred twenty".