212211222011220 has 96 divisors (see below), whose sum is σ = 595708969314816. Its totient is φ = 56445192115200.

The previous prime is 212211222011171. The next prime is 212211222011227. The reversal of 212211222011220 is 22110222112212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212211222011227) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 110165550 + ... + 112075290.

It is an arithmetic number, because the mean of its divisors is an integer number (6205301763696).

Almost surely, 2^{212211222011220} is an apocalyptic number.

212211222011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212211222011220 is an abundant number, since it is smaller than the sum of its proper divisors (383497747303596).

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

212211222011220 is a wasteful number, since it uses less digits than its factorization.

212211222011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1914481 (or 1914479 counting only the distinct ones).

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

Adding to 212211222011220 its reverse (22110222112212), we get a palindrome (234321444123432).

The spelling of 212211222011220 in words is "two hundred twelve trillion, two hundred eleven billion, two hundred twenty-two million, eleven thousand, two hundred twenty".