212112122220120 has 64 divisors (see below), whose sum is σ = 636343844221440. Its totient is φ = 56562567920000.

The previous prime is 212112122220101. The next prime is 212112122220121. The reversal of 212112122220120 is 21022221211212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212112122220121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88656 + ... + 20596895.

It is an arithmetic number, because the mean of its divisors is an integer number (9942872565960).

Almost surely, 2^{212112122220120} is an apocalyptic number.

212112122220120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212112122220120 is an abundant number, since it is smaller than the sum of its proper divisors (424231722001320).

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

212112122220120 is a wasteful number, since it uses less digits than its factorization.

212112122220120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20771016 (or 20771012 counting only the distinct ones).

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

Adding to 212112122220120 its reverse (21022221211212), we get a palindrome (233134343431332).

The spelling of 212112122220120 in words is "two hundred twelve trillion, one hundred twelve billion, one hundred twenty-two million, two hundred twenty thousand, one hundred twenty".