212202122221220 has 12 divisors (see below), whose sum is σ = 445624456664604. Its totient is φ = 84880848888480.

The previous prime is 212202122221211. The next prime is 212202122221261. The reversal of 212202122221220 is 22122221202212.

It can be written as a sum of positive squares in 2 ways, for example, as 32664151145536 + 179537971075684 = 5715256^2 + 13399178^2 .

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 3 ways as a sum of consecutive naturals, for example, 5305053055511 + ... + 5305053055550.

It is an arithmetic number, because the mean of its divisors is an integer number (37135371388717).

Almost surely, 2^{212202122221220} is an apocalyptic number.

212202122221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212202122221220 is an abundant number, since it is smaller than the sum of its proper divisors (233422334443384).

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

212202122221220 is a wasteful number, since it uses less digits than its factorization.

212202122221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10610106111070 (or 10610106111068 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 212202122221220 its reverse (22122221202212), we get a palindrome (234324343423432).

The spelling of 212202122221220 in words is "two hundred twelve trillion, two hundred two billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred twenty".