212123320120 has 64 divisors (see below), whose sum is σ = 506056636800. Its totient is φ = 79746938880.

The previous prime is 212123320067. The next prime is 212123320121. The reversal of 212123320120 is 21023321212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212123320121) 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, 271990 + ... + 705850.

It is an arithmetic number, because the mean of its divisors is an integer number (7907134950).

Almost surely, 2^212123320120 is an apocalyptic number.

212123320120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212123320120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253028318400).

212123320120 is an abundant number, since it is smaller than the sum of its proper divisors (293933316680).

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

212123320120 is a wasteful number, since it uses less digits than its factorization.

212123320120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434608 (or 434604 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 212123320120 its reverse (21023321212), we get a palindrome (233146641332).

The spelling of 212123320120 in words is "two hundred twelve billion, one hundred twenty-three million, three hundred twenty thousand, one hundred twenty".