20212202212220 has 12 divisors (see below), whose sum is σ = 42445624645704. Its totient is φ = 8084880884880.

The previous prime is 20212202212171. The next prime is 20212202212243. The reversal of 20212202212220 is 2221220221202.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1010610110611 = 20212202212220 / (2 + 0 + 2 + 1 + 2 + 2 + 0 + 2 + 2 + 1 + 2 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 20212202212192 and 20212202212201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505305055286 + ... + 505305055325.

It is an arithmetic number, because the mean of its divisors is an integer number (3537135387142).

Almost surely, 2^{20212202212220} is an apocalyptic number.

20212202212220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20212202212220 is an abundant number, since it is smaller than the sum of its proper divisors (22233422433484).

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

20212202212220 is a wasteful number, since it uses less digits than its factorization.

20212202212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010610110620 (or 1010610110618 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 20212202212220 its reverse (2221220221202), we get a palindrome (22433422433422).

The spelling of 20212202212220 in words is "twenty trillion, two hundred twelve billion, two hundred two million, two hundred twelve thousand, two hundred twenty".