212212021111020 has 288 divisors, whose sum is σ = 765287836185600. Its totient is φ = 46571359468032.

The previous prime is 212212021111003. The next prime is 212212021111033. The reversal of 212212021111020 is 20111120212212.

212212021111020 is a `hidden beast` number, since 212 + 212 + 0 + 211 + 1 + 10 + 20 = 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 = 212212021110984 and 212212021111002.

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 95 ways as a sum of consecutive naturals, for example, 9681864 + ... + 22763183.

It is an arithmetic number, because the mean of its divisors is an integer number (2657249431200).

Almost surely, 2^{212212021111020} is an apocalyptic number.

212212021111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212212021111020 is an abundant number, since it is smaller than the sum of its proper divisors (553075815074580).

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

212212021111020 is a wasteful number, since it uses less digits than its factorization.

212212021111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32445277 (or 32445272 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 212212021111020 its reverse (20111120212212), we get a palindrome (232323141323232).

The spelling of 212212021111020 in words is "two hundred twelve trillion, two hundred twelve billion, twenty-one million, one hundred eleven thousand, twenty".