212001122220220 has 24 divisors (see below), whose sum is σ = 445359505513104. Its totient is φ = 84770515773696.

The previous prime is 212001122220203. The next prime is 212001122220229. The reversal of 212001122220220 is 22022221100212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212001122220229) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1870761574 + ... + 1870874893.

It is an arithmetic number, because the mean of its divisors is an integer number (18556646063046).

Almost surely, 2^{212001122220220} is an apocalyptic number.

212001122220220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212001122220220 is an abundant number, since it is smaller than the sum of its proper divisors (233358383292884).

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

212001122220220 is a wasteful number, since it uses less digits than its factorization.

212001122220220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3741639309 (or 3741639307 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 212001122220220 its reverse (22022221100212), we get a palindrome (234023343320432).

The spelling of 212001122220220 in words is "two hundred twelve trillion, one billion, one hundred twenty-two million, two hundred twenty thousand, two hundred twenty".