212212011221220 has 48 divisors (see below), whose sum is σ = 594194515463808. Its totient is φ = 56589785464320.

The previous prime is 212212011221209. The next prime is 212212011221227. The reversal of 212212011221220 is 22122110212212.

It is not an unprimeable number, because it can be changed into a prime (212212011221227) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 45227260 + ... + 49698380.

It is an arithmetic number, because the mean of its divisors is an integer number (12379052405496).

Almost surely, 2^{212212011221220} is an apocalyptic number.

212212011221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212212011221220 is an abundant number, since it is smaller than the sum of its proper divisors (381982504242588).

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

212212011221220 is a wasteful number, since it uses less digits than its factorization.

212212011221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5262180 (or 5262178 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 212212011221220 its reverse (22122110212212), we get a palindrome (234334121433432).

The spelling of 212212011221220 in words is "two hundred twelve trillion, two hundred twelve billion, eleven million, two hundred twenty-one thousand, two hundred twenty".