212120312120 has 64 divisors (see below), whose sum is σ = 486607500000. Its totient is φ = 83190435328.

The previous prime is 212120312083. The next prime is 212120312143. The reversal of 212120312120 is 21213021212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3144506 + ... + 3211254.

Almost surely, 2^212120312120 is an apocalyptic number.

212120312120 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 212120312120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243303750000).

212120312120 is an abundant number, since it is smaller than the sum of its proper divisors (274487187880).

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

212120312120 is a wasteful number, since it uses less digits than its factorization.

212120312120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68312 (or 68308 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 212120312120 its reverse (21213021212), we get a palindrome (233333333332).

The spelling of 212120312120 in words is "two hundred twelve billion, one hundred twenty million, three hundred twelve thousand, one hundred twenty".