20211210220220 has 12 divisors (see below), whose sum is σ = 42443541462504. Its totient is φ = 8084484088080.

The previous prime is 20211210220207. The next prime is 20211210220259. The reversal of 20211210220220 is 2202201211202.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505280255486 + ... + 505280255525.

It is an arithmetic number, because the mean of its divisors is an integer number (3536961788542).

Almost surely, 2^{20211210220220} is an apocalyptic number.

20211210220220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20211210220220 is an abundant number, since it is smaller than the sum of its proper divisors (22232331242284).

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

20211210220220 is a wasteful number, since it uses less digits than its factorization.

20211210220220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010560511020 (or 1010560511018 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20211210220220 its reverse (2202201211202), we get a palindrome (22413411431422).

The spelling of 20211210220220 in words is "twenty trillion, two hundred eleven billion, two hundred ten million, two hundred twenty thousand, two hundred twenty".